Turn on your oven, and you’ll warm up the kitchen. With the oven door open, the kitchen warms up even faster. That much is obvious since the purpose of an oven is to make things hot. But it’s not true for your refrigerator.

Running the refrigerator makes the room warmer and if you leave the door open, the kitchen warms up even faster. The first rush of cold air may cool things down a little, but in the long run, the room will get warmer.

To see why, we need to think of heat as energy and cold as a lack of energy. The stove produces heat, but the refrigerator can’t actually produce cold. All the refrigerator does is move heat, or energy, from one place to another. As the food inside the refrigerator loses its heat–or, in other words, gets colder that hear ends up in the kitchen.

Physicists call this kind of system a “heat pump.” But like any motor, the heat pump in your refrigerator needs energy just to run. So while it’s busy moving energy out of the fridge and into the kitchen, it’s also drawing in more energy in the form of electricity or gas. Since some of that energy is released as heat, you end up with more heat in the kitchen than you started with.

Air conditioners can cool your house because part of the unit is outside. That way the air conditioner can pump the heat out of your house and releases it to the outdoors. So just as your refrigerator heats your kitchen while cooling the food, air conditioners heat the outdoors while cooling your house.

Quantum physics is usually just intimidating from the get-go. It’s kind of weird and can seem counter-intuitive, even for the physicists who deal with it every day. But it’s not incomprehensible. If you’re reading something about quantum physics, there are really six key concepts about it that you should keep in mind. Do that, and you’ll find quantum physics a lot easier to understand.

Everything Is Made Of Waves; Also, Particles

There’s lots of places to start this sort of discussion, and this is as good as any: everything in the universe has both particle and wave nature, at the same time. There’s a line in Greg Bear’s fantasy duology (The Infinity Concerto and The Serpent Mage), where a character describing the basics of magic says “All is waves, with nothing waving, over no distance at all.” I’ve always really liked that as a poetic description of quantum physics– deep down, everything in the universe has wave nature.

Of course, everything in the universe also has particle nature. This seems completely crazy, but is an experimental fact, worked out by a surprisingly familiar process:

Of course, describing real objects as both particles and waves is necessarily somewhat imprecise. Properly speaking, the objects described by quantum physics are neither particles nor waves, but a third category that shares some properties of waves (a characteristic frequency and wavelength, some spread over space) and some properties of particles (they’re generally countable and can be localized to some degree). This leads to some lively debate within the physics education community about whether it’s really appropriate to talk about light as a particle in intro physics courses; not because there’s any controversy about whether light has some particle nature, but because calling photons “particles” rather than “excitations of a quantum field” might lead to some student misconceptions. I tend not to agree with this, because many of the same concerns could be raised about calling electrons “particles,” but it makes for a reliable source of blog conversations.

This “door number three” nature of quantum objects is reflected in the sometimes confusing language physicists use to talk about quantum phenomena. The Higgs boson was discovered at the Large Hadron Collider as a particle, but you will also hear physicists talk about the “Higgs field” as a delocalized thing filling all of space. This happens because in some circumstances, such as collider experiments, it’s more convenient to discuss excitations of the Higgs field in a way that emphasizes the particle-like characteristics, while in other circumstances, like general discussion of why certain particles have mass, it’s more convenient to discuss the physics in terms of interactions with a universe-filling quantum field. It’s just different language describing the same mathematical object.

Quantum Physics Is Discrete

Ultra-precise spectroscopy can also be used to look for things like dark matter, and is part of the motivation for a low-energy fundamental physics institute.

This isn’t always obvious– even some things that are fundamentally quantum, like black-body radiation, appear to involve continuous distributions. But there’s always a kind of granularity to the underlying reality if you dig into the mathematics, and that’s a large part of what leads to the weirdness of the theory.

Quantum Physics Is Probabilistic

One of the most surprising and (historically, at least) controversial aspects of quantum physics is that it’s impossible to predict with certainty the outcome of a single experiment on a quantum system. When physicists predict the outcome of some experiment, the prediction always takes the form of a probability for finding each of the particular possible outcomes, and comparisons between theory and experiment always involve inferring probability distributions from many repeated experiments.

The mathematical description of a quantum system typically takes the form of a “wavefunction,” generally represented in equations by the Greek letter psi: Ψ. There’s a lot of debate about what, exactly, this wavefunction represents, breaking down into two main camps: those who think of the wavefunction as a real physical thing (the jargon term for these is “ontic” theories, leading some witty person to dub their proponents “psi-ontologists”) and those who think of the wavefunction as merely an expression of our knowledge (or lack thereof) regarding the underlying state of a particular quantum object (“epistemic” theories).

In either class of foundational model, the probability of finding an outcome is not given directly by the wavefunction, but by the square of the wavefunction (loosely speaking, anyway; the wavefunction is a complex mathematical object (meaning it involves imaginary numbers like the square root of negative one), and the operation to get probability is slightly more involved, but “square of the wavefunction” is enough to get the basic idea). This is known as the “Born Rule” after German physicist Max Born who first suggested this (in a footnote to a paper in 1926), and strikes some people as an ugly ad hoc addition. There’s an active effort in some parts of the quantum foundations community to find a way to derive the Born rule from a more fundamental principle; to date, none of these have been fully successful, but it generates a lot of interesting science.

This is also the aspect of the theory that leads to things like particles being in multiple states at the same time. All we can predict is probability, and prior to a measurement that determines a particular outcome, the system being measured is in an indeterminate state that mathematically maps to a superposition of all possibilities with different probabilities. Whether you consider this as the system really being in all of the states at once, or just being in one unknown state depends largely on your feelings about ontic versus epistemic models, though these are both subject to constraints from the next item on the list:

Quantum Physics Is Non-Local

The last great contribution Einstein made to physics was not widely recognized as such, mostly because he was wrong. In a 1935 paper with his younger colleagues Boris Podolsky and Nathan Rosen (the “EPR paper”), Einstein provided a clear mathematical statement of something that had been bothering him for some time, an idea that we now call “entanglement.”

The EPR paper argued that quantum physics allowed the existence of systems where measurements made at widely separated locations could be correlated in ways that suggested the outcome of one was determined by the other. They argued that this meant the measurement outcomes must be determined in advance, by some common factor, because the alternative would require transmitting the result of one measurement to the location of the other at speeds faster than the speed of light. Thus, quantum mechanics must be incomplete, a mere approximation to some deeper theory (a “local hidden variable” theory, one where the results of a particular measurement do not depend on anything farther away from the measurement location than a signal could travel at the speed of light (“local”), but are determined by some factor common to both systems in an entangled pair (the “hidden variable”)).

This was regarded as an odd footnote for about thirty years, as there seemed to be no way to test it, but in the mid-1960’s the Irish physicist John Bell worked out the consequences of the EPR paper in greater detail. Bell showed that you can find circumstances in which quantum mechanics predicts correlations between distant measurements that are stronger than anypossible theory of the type preferred by E, P, and R. This was tested experimentally in the mid-1970’s by John Clauser, and a series of experiments by Alain Aspect in the early 1980’s is widely considered to have definitively shown that these entangled systems cannot possibly be explained by any local hidden variable theory.

The most common approach to understanding this result is to say that quantum mechanics is non-local: that the results of measurements made at a particular location can depend on the properties of distant objects in a way that can’t be explained using signals moving at the speed of light. This does not, however, permit the sending of information at speeds exceeding the speed of light, though there have been any number of attempts to find a way to use quantum non-locality to do that. Refuting these has turned out to be a surprisingly productive enterpriseQuantum non-locality is also central to the problem of information in evaporating black holes, and the “firewall” controversy that has generated a lot of recent activity. There are even some radical ideas involving a mathematical connection between the entangled particles described in the EPR paper and wormholes.

Quantum Physics Is (Mostly) Very Small

Quantum physics has a reputation of being weird because its predictions are dramatically unlike our everyday experience This happens because the effects involved get smaller as objects get larger– if you want to see unambiguously quantum behavior, you basically want to see particles behaving like waves, and the wavelength decreases as the momentum increases. The wavelength of a macroscopic object like a dog walking across the room is so ridiculously tiny that if you expanded everything so that a single atom in the room were the size of the entire Solar System, the dog’s wavelength would be about the size of a single atom within that solar system.

This means that, for the most part, quantum phenomena are confined to the scale of atoms and fundamental particles, where the masses and velocities are small enough for the wavelengths to get big enough to observe directly. There’s an active effort in a bunch of areas, though, to push the size of systems showing quantum effects up to larger sizes. there are a bunch of groups in “cavity opto-mechanics” trying to use light to slow the motion of chunks of silicon down to the point where the discrete quantum nature of the motion would become clear. There are even some suggestions that it might be possible to do this with suspended mirrors having masses of several grams, which would be amazingly cool.

Quantum Physics Is Not Magic

The previous point leads very naturally into this one: as weird as it may seem, quantum physics is most emphatically not magic. The things it predicts are strange by the standards of everyday physics, but they are rigorously constrained by well-understood mathematical rules and principles.

So, if somebody comes up to you with a “quantum” idea that seems too good to be true– free energy, mystical healing powers, impossible space drives– it almost certainly is. That doesn’t mean we can’t use quantum physics to do amazing things– you can find some really cool physics in mundane technology– but those things stay well within the boundaries of the laws of thermodynamics and just basic common sense.

So there you have it: the core essentials of quantum physics. I’ve probably left a few things out, or made some statements that are insufficiently precise to please everyone, but this ought to at least serve as a useful starting point for further discussion.

All of you must have read on your lower classes about the definition of time ? And may have answered ‘Time is the difference between two events’. Is this enough points to define the definition of this vast question “TIME”? Not at all, then what’s the exact definition of ‘Time’?.

Time, the most mysterious stuff that is still un-defined by this modern era of science. The indefinite continued progress of existence and events in the past, present, and future regarded as a whole is the simplicity definition of time. Whenever we discuss about time we can’t miss the fourth(4th) dimension, space time & space curvature.

For better understanding first of all let you know about space time, space curvature & 4th dimension. space time directly related to the dimensions;
In physics, space time is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum. Space time diagrams can be used to visualize relativistic effects such as why different observers perceive where and when events occur differently.

Diagram : Space Time

Let us make you more understanding;

Physics is the only science that explicitly studies time, but even physicists agree that time is one of the most difficult properties of our universe to understand. Even in the most modern and complex physical models, though, time is usually considered to be an ontologically “basic” or primary concept, and not made up of, or dependent on, anything else.

In the sciences generally, time is usually defined by its measurement it is simply what a clock reads. Physics in particular often requires extreme levels of precision in time measurement, which has led to the requirement that time be considered an infinitely divisible linear continuum, and not quantized (i.e. composed of discrete and indivisible units). With modern atomic time standards like TAI and UTC and ultra-precise atomic clocks, time can now be measured accurate to about 10−15 seconds, which corresponds to about 1 second error in approximately 30 million years.

But several different conceptions and applications of time have been explored over the centuries in different areas of physics, and we will look at some of these in this articles.

In non-relativistic or classical physics, the concept of time generally used is that of  absolute time (also called Newtonian time after its most famous proponent), time which is independent of any perceiver, progresses at a consistent pace for everyone everywhere throughout the universe, and is essentially imperceptible and mathematical in nature. This accords with most people’s everyday experience of how time flows.

However, since the advent of relativity in the early 20th Century, relativitistic time has become the normal within physics. This takes into account phenomena such as time dilation for fast-moving objects, gravitational time dilation for objects caught in extreme gravitational fields, and the important idea that time is really just one element of four-dimensional space-time.

Relativity also allows for, at least in theory, the prospect of time travel, and there are several scenarios which allow for the theoretical basis of travel in time. There are even theoretical faster-than-light time-travelling particles like tachyons and neutrinos. However, the concept of time travel also brings with it a number of paradoxes, and its likelihood and physical practicality is questioned by many physicists.

Quantum mechanics revolutionized physics in the first half of the 20th Century and it still represents the most complete and accurate model of the universe we have. Time is perhaps not as central a concept in quantum theory as it is in classical physics, and there is really no such thing as “quantum time” as such. For example, time does not appear to be divided up into discrete quanta as are most other aspects of reality. However, the different interpretations of quantum theory (e.g. the Copenhagen interpretation, the many worlds interpretation, etc) do have some potentially important implications for our understanding of time.

Most physicists agree that time had a beginning, and that it is measured from, and indeed came into being with, The Big Bang some 13.8 billion years ago. Whether, how and when time might end in the future is a more open question, depending on different notions of the ultimate fate of the universe and other mind-bending concepts like the multiverse.

The so-called arrow of time refers to the one-way direction or asymmetry of time, which leads to the way we instinctively perceive time as moving forwards from the fixed and immutable past, though the present, towards the unknown and unfixed future. This idea has it roots in physics, particularly in the Second Law of Thermodynamics, although other, often related, arrows of time have also been identified.

Time: it’s constantly running out and we never have enough of it. Some say it’s an illusion, some say it flies like an arrow. Well, this arrow of time is a big headache in physics. Why does time have a particular direction? And can such a direction be reversed?

A new study, published in Scientific Reports, is providing an important point of discussion on the subject. An international team of researchers has constructed a time-reversal program on a quantum computer, in an experiment that has huge implications for our understanding of quantum computing. Their approach also revealed something rather important: the time-reversal operation is so complex that it is extremely improbable, maybe impossible, for it to happen spontaneously in nature.

As far as laws of physics go, in many cases, there’s nothing to stop us going forward and backward in time. In certain quantum systems it is possible to create a time-reversal operation. Here, the team crafted a thought experiment based on a realistic scenario.The evolution of a quantum system is governed by Schrödinger’s Equation, which gives us the probability of a particle being in a certain region. Another important law of quantum mechanics is the Heisenberg Uncertainty Principle, which tells us that we cannot know the exact position and momentum of a particle because everything in the universe behaves like both a particle and a wave at the same time.

The researchers wanted to see if they could get time to spontaneously reverse itself for one particle for just the fraction of a second. They use the example of a cue breaking a billiard ball triangle and the balls going in all directions – a good analog for the second law of thermodynamics, an isolated system will always go from order to chaos – and then having the balls reverse back into order.

The team set out to test if this can happen, both spontaneously in nature and in the lab. Their thought experiment started with a localized electron, which means they were pretty sure of its position in a small region of space. The laws of quantum mechanics make knowing this with precision difficult. The idea is to have the highest probability that the electron is within a certain region. This probability “smears” out as times goes on, making it more likely for the particle to be in a wider region. The researchers then suggest a time-reversal operation to bring the electron back to its localization. The thought experiment was followed up by some real math.

The researchers estimated the probability of this happening to a real-world electron due to random fluctuations. If we were to observe 10 billion “freshly localized” electrons every second over the entire lifetime of the universe (13.7 billion years), we would only see it happen once. And it would merely take the quantum state back one 10-billionth of a second into the past, roughly the time it takes between a traffic light turning green and the person behind you honking.

While time reversal is unlikely to happen in nature, it is possible in the lab. The team decided to simulate the localized electron idea in a quantum computer and create a time-reversal operation that would bring it back to the original state. One thing that was clear was this; the bigger the simulation got, the more complex (and less accurate) it became. In a two quantum-bit (qubit) setup simulating the localized electron, researchers were able to reverse time in 85 percent of the cases. In a three-qubit setup, only 50 percent of the cases were successful, and more errors occurred.

While time reversal programs in quantum computers are unlikely to lead to a time machine (Deloreans are better suited for that), it might have some important applications in making quantum computers more precise in the future.

Brief Description Of Quantum Mechanics

Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including Quantum Field Theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particle.

Quantum mechanics is weird. The theory, which describes the workings of tiny particles and forces, notoriously made Albert Einstein so uneasy that in 1935 he and his colleagues claimed that it must be incomplete—it was too “spooky” to be real.

Uses of Quantum Mechanics

Today, the most precise clocks in the world, atomic clocks, are able to use principles of quantum theory to measure time. They monitor the specific radiation frequency needed to make electrons jump between energy levels. Researchers’ next big goal is to successfully use entanglement to enhance precision.

Some of the uses of Quantum Mechanic are;

1. Ultra-Precise Clocks

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Reliable timekeeping is about more than just your morning alarm. Clocks synchronize our technological world, keeping things like stock markets and GPS systems in line. Standard clocks use the regular oscillations of physical objects like pendulums or quartz crystals to produce their ‘ticks’ and ‘tocks’. Today, the most precise clocks in the world, atomic cloaks, are able to use principles of quantum theory to measure time. They monitor the specific radiation frequency needed to make electrons jump between energy levels. The quantum-logic cloak at the U.S. National Institute of Standards and Technology (NIST) in Colorado only loses or gains a second every 3.7 billion years. And the NIST strontium clock, unveiled earlier this year, will be that accurate for 5 billion years—longer than the current age of the Earth. Such super-sensitive atomic clocks help with GPS navigation, telecommunications and surveying.

The precision of atomic clocks relies partially on the number of atoms used. Kept in a vacuum chamber, each atom independently measures time and keeps an eye on the random local differences between itself and its neighbors. If scientists cram 100 times more atoms into an atomic clock, it becomes 10 times more precise—but there is a limit on how many atoms you can squeeze in. Researchers’ next big goal is to successfully use entanglement to enhance precision. Entangled atoms would not be preoccupied with local differences and would instead solely measure the passage of time, effectively bringing them together as a single pendulum. That means adding 100 times more atoms into an entangled clock would make it 100 times more precise. Entangled clocks could even be linked to form a worldwide network that would measure time independent of location.

2. Uncrakable Codes

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Traditional cryptography works using keys: A sender uses one key to encode information, and a recipient uses another to decode the message. However, it’s difficult to remove the risk of an eavesdropper, and keys can be compromised. This can be fixed using potentially unbreakable quantum key distribution (QKD). In QKD, information about the key is sent via photons that have been randomly polarized. This restricts the photon so that it vibrates in only one plane—for example, up and down, or left to right. The recipient can use polarized filters to decipher the key and then use a chosen algorithm to securely encrypt a message. The secret data still gets sent over normal communication channels, but no one can decode the message unless they have the exact quantum key. That’s tricky, because quantum rules dictate that “reading” the polarized photons will always change their states, and any attempt at eavesdropping will alert the communicators to a security breach.

Today companies such as BBN Technologies, Toshiba and ID Quantique use QKD to design ultra-secure networks. In 2007 Switzerland tried out an ID Quantique product to provide a tamper-proof voting system during an election. And the first bank transfer using entangled QKD went ahead in Austria in 2004. This system promises to be highly secure, because if the photons are entangled, any changes to their quantum states made by interlopers would be immediately apparent to anyone monitoring the key-bearing particles. But this system doesn’t yet work over large distances. So far, entangled photons have been transmitted over a Maximum distance of about 88 miles.

3. Super-powerful Computers

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A standard computer encodes information as a string of binary digits, or bits. Quantum computers supercharge processing power because they use quantum bits, or qubits, which exist in a superposition of states—until they are measured, qubits can be both “1” and “0″ at the same time.

This field is still in development, but there have been steps in the right direction. In 2011, D-Wave Systems revealed the D-Wave One, a 128-qubit processor, followed a year later by the 512-qubit D-Wave Two. The company says these are the world’s first commercially available quantum computers. However, this claim has been met with skepticism, in part because it’s still unclear whether D-Wave’s qubits are entangled. Studies released in May found evidence of entanglement but only in a small subset of the computer’s qubits. There’s also uncertainty over whether the chips display any reliable quantum speedway. Still, NASA and Google have teamed up to form the Quantum Artificial Intelligence Lab based on a D-Wave Two. And scientists at the University of Bristol last year hooked up one of their quantum chips to the Internet so anyone with a web browser can learn quantum coding.

4. Improved Microscopes

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In February a team of researchers at Japan’s Hokkaido University developed the world’s first entanglement-enhance microscopes, using a technique known as differential interference contrast microscopy. This type of microscope fires two beams of photons at a substance and measures the interference pattern created by the reflected beams—the pattern changes depending on whether they hit a flat or uneven surface. Using entangled photons greatly increases the amount of information the microscope can gather, as measuring one entangled photon gives information about its partner.

The Hokkaido team managed to image an engraved “Q” that stood just 17 nano meters above the background with unprecedented sharpness. Similar techniques could be used to improve the resolution of astronomy tools called interferometers, which superimpose different waves of light to better analyze their properties. Interferometers are used in the hunt for extra-solar planets, to probe nearby stars and to search for ripples in space time called gravitational waves.

5. Biological Compass

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Humans aren’t the only ones making use of quantum mechanics. One leading theory suggests that birds like the European robin use the spooky action to keep on track when they migrate. The method involves a light-sensitive protein called cryptochrome, which may contain entangled electrons. As photons enter the eye, they hit the cryptochrome molecules and can deliver enough energy to break them apart, forming two reactive molecules, or radicals, with unpaired but still entangled electrons. The magnetic field surrounding the bird influences how long these cryptochrome radicals last. Cells in the bird’s retina are thought to be very sensitive to the presence of the entangled radicals, allowing the animals to effectively ‘see’ a magnetic map based on the molecules.

This process isn’t full understood, though, and there is another option: Birds’ magnetic sensitivity could be due to small crystals of magnetic minerals in their beaks. Still, if entanglement really is at play, experiments suggest that the delicate state must last much longer in a bird’s eye than in even the best artificial systems. The magnetic compass could also be applicable to certain lizards, crustaceans, insects and even some mammals. For instance, a form of cryptochrome used for magnetic navigation in flies has also been found in human eye, although it’s unclear if it is or once was useful for a similar purpose.

Thank you So Much for Reading this Guys. Have a Nice Day.

“Science is Fun, We believe” – Limited Science        

Here are some of the mind blowing discoveries in physics ,some cool physics topics,interesting physics facts& some weird physics facts.Physics has revealed some spooky sides of our world.Here are seven of the most mind-blowing recent discoveries.

The study of physics is the study of the universe—and more specifically, just how the hell the universe works. It is without a doubt the most interesting branch of science, because the universe, as it turns out, is a whole lot more complicated than it looks on the surface (and it looks pretty complicated already). The world works in some really weird ways, and though you may need a PhD to understand why, you only need a sense of awe to appreciate how. Here are ten of the most amazing things physicists have discovered about our universe:


10) Time Stops at the Speed of Light

                      Speed of Light


According to Einstein’s  Theory of special relativity, the speed of light can never change—it’s always stuck at approximately 300,000,000 meters/second, no matter who’s observing it. This in itself is incredible enough, given that nothing can move faster than light, but it’s still very theoretical. The really cool part of Special Relativity is an idea called time dilation, which states that the faster you go, the slower time passes for you relative to your surroundings. Seriously—if you go take a ride in your car for an hour, you will have aged ever-so-slightly less than if you had just sat at home on the computer. The extra nanoseconds you get out of it might not be worth the price of gas, but hey, it’s an option.

Of course, time can only slow down so much, and the formula works out so that if you’re moving at the speed of light, time isn’t moving at all. Now, before you go out and try some get-immortal-quick scheme, just note that moving at the speed of light isn’t actually possible, unless you happen to be made of light. Technically speaking, moving that fast would require an infinite amount of energy (and I for one don’t have that kind of juice just lying around).

9) Quantum Entanglement

         Quantum Entanglement

Alright, so we just finished agreeing that nothing can move faster than the speed of light—right? Well… yes and no. While that’s technically still true, at least in theory, it turns out that there’s a loophole to be found in the mind-blowing branch of physics known as quantum mechanics.

Quantum mechanics, in essence, is the study of physics at a microscopic scale, such as the behavior of subatomic particles. These types of particles are impossibly small, but very important, as they form the building blocks for everything in the universe. I’ll leave the technical details aside for now (it gets pretty complicated), but you can picture them as tiny, spinning, electrically-charged marbles. Okay, maybe that’s kind of complicated too. Just roll with it (pun intended).

So say we have two electrons (a subatomic particle with a negative charge). Quantum entanglement is a special process that involves pairing up these particles in such a way that they become identical (marbles with the same spin and charge). When this happens, things get weird—because from now on, these electrons stay identical. This means that if you change one of them—say, spin it in the other direction—its twin reacts in exactly the same way. Instantly. No matter where it is. Without you even touching it. The implications of this process are huge—it means that information (in this case, the direction of spin) can essentially be teleported anywhere in the universe.


8) Light is Affected by Gravity


                           Light is Affected by Gravity

But let’s get back to light for a minute, and talk about the Theory of General Relativity this time (also by Einstein). This one involves an idea called light deflection, which is exactly what it sounds like—the path of a beam of light is not entirely straight.

Strange as that sounds, it’s been proved repeatedly (Einstein even got a parade thrown in his honor for properly predicting it). What it means is that, even though light doesn’t have any mass, its path is affected by things that do—such as the sun. So if a beam of light from, say, a far off star passes close enough to the sun, it will actually bend slightly around it. The effect on an observer—such as us—is that we see the star in a different spot of sky than it’s actually located (much like fish in a lake are never in the spot they appear to be). Remember that the next time you look up at the stars—it could all just be a trick of the light.

7) Dark Matter

                       Dark Matter


Thanks to some of the theories we’ve already discussed (plus a whole lot we haven’t), physicists have some pretty accurate ways of measuring the total mass present in the universe. They also have some pretty accurate ways of measuring the total mass we can observe, and here’s the twist—the two numbers don’t match up.

In fact, the amount of total mass in the universe is vastly greater than the total mass we can actually account for. Physicists were forced to come up with an explanation for this, and the leading theory right now involves dark matter—a mysterious substance that emits no light and accounts for approximately 95% of the mass in the universe. While it hasn’t been formally proved to exist (because we can’t see it), dark matter is supported by a ton of evidence, and has to exist in some form or another in order to explain the universe.

6) Our Universe is Rapidly Expanding

                          Our Universe is Rapidly Expanding

Here’s where things get a little trippy, and to understand why, we have to go back to the Big Bang Theory. Before it was a TV show, the Big Bang Theory was an important explanation for the origin of our universe. In the most simple analogy possible, it worked kind of like this: the universe started as an explosion. Debris (planets, stars, etc) was flung around in all directions, driven by the enormous energy of the blast. Because all of this debris is so heavy, and thus affected by the gravity of everything behind it, we would expect this explosion to slow down after a while.

It doesn’t. In fact, the expansion of our universe is actually getting faster over time, which is as crazy as if you threw a baseball that kept getting faster and faster instead of falling back to the ground (though don’t try that at home). This means, in effect, that space is always growing. The only way to explain this is with dark matter, or, more accurately, dark energy, which is the driving force behind this cosmic acceleration. So what in the world is dark energy, you ask? Well, that’s another interesting thing…


5) All Matter is Just Energy

                All Matter is Just Energy

It’s true—matter and energy are just two sides of the same coin. In fact, you’ve known this your whole life, if you’ve ever heard of the formula E= mc^2. The E is for energy, and the m represents mass. The amount of energy contained in a particular amount of mass is determined by the conversion factor c squared, where c represents—wait for it—the speed of light.

The explanation for this phenomenon is really quite fascinating, and it has to do with the fact that the mass of an object increases as it approaches the speed of light (even as time is slowing down). It is, however, quite complicated, so for the purposes of this article, I’ll simply assure you that it’s true. For proof (unfortunately), look no further than atomic bombs, which convert very small amounts of matter into very large amounts of energy.

4) Wave-Particle Duality

               Wave Particle Duality


Speaking of things that are other things…

At first glance, particles (such as an electron) and waves (such as light) couldn’t be more different. One is a solid chunk of matter, and the other is a radiating beam of energy, kind of. It’s apples and oranges. But as it turns out, things like light and electrons can’t really be confined to one state of existence—they act as both particles and waves, depending on who’s looking.

No, seriously. I know that sounds ridiculous (and it’ll sound even crazier when we get to Number 1), but there’s concrete evidence that proves light is a wave, and other concrete evidence that proves light is a particle (ditto for electrons). It’s just… both. At the same time. Not some sort of intermediary state between the two, mind you—physically both, in the sense that it can be either. Don’t worry if that doesn’t make a lot of sense, because we’re back in the realm of quantum mechanics, and at that level, the universe doesn’t like to be made sense of anyway.

3) All Objects Fall at the Same Speed

            All Objects Fall at the Same Speed

Let’s calm things down for a second, because modern physics is a lot to take in at once. That’s okay—classical physics proved some pretty cool concepts too.

You would be forgiven for assuming that heavier objects fall faster than lighter ones—it sounds like common sense, and besides, you know for a fact that a bowling ball drops more quickly than a feather. And this is true, but it has nothing to do with gravity—the only reason this occurs is because the earth’s atmosphere provides resistance. In reality, as Galileo first realized about 400 years ago, gravity works the same on all objects, regardless of their mass. What this means is that if you repeated the feather/bowling ball experiment on the moon (which has no atmosphere), they would hit the ground at the exact same time.

2) Quantum Foam


                      Quantum Foam

Alright, break over. Things are going to get weird again.

The thing about empty space, you’d think, is that it’s empty. That sounds like a pretty safe assumption—it’s in the name, after all. But the universe, it happens, is too restless to put up with that, which is why particles are constantly popping into and out of existence all over the place. They’re called virtual particles, but make no mistake—they’re real, and proven. They exist for only a fraction of a second, which is long enough to break some fundamental laws of physics but quick enough that this doesn’t actually matter (like if you stole something from a store, but put it back on the shelf half a second later). Scientists have called this phenomenon ‘quantum foam,’ because apparently it reminded them of the shifting bubbles in the head of a soft drink.

1) The Double Slit Experiment

                           The Double Slit Experiment


So remember a few entries ago, when I said everything was both a wave and a particle at the same time? Of course you do, you’ve been following along meticulously. But here’s the other thing—you know from experience that things have definite forms—an apple in your hand is an apple, not some weird apple-wave thing. So what, then, causes something to definitively become a particle or a wave? As it turns out, we do.

The double slit experiment is the most insane thing you’ll read about all day, and it works like this—scientists set up a screen with two slits in front of a wall, and shot a beam of light through the slits so they could see where it hit on the wall. Traditionally, with light being a wave, it would exhibit something called a diffraction pattern, and you would see a band of light spread across the wall. That’s the default—if you set up the experiment right now, that’s what you would see.

But that’s not how particles would react to a double slit —they would just go straight through to create two lines on the wall that match up with the slits. And if light is a particle, why doesn’t it exhibit this property instead of a diffraction pattern? The answer is that it does—but only if we want it to. See, as a wave, light travels through both slits at the same time, but as a particle, it can only travel through one. So if we want it to act like a particle, all we have to do is set up a tool to measure exactly which slit each bit of light (called a photon) goes through. Think of it like a camera—if it takes a picture of each photon as it passes through a single slit, then that photon can’t have passed through both slits, and thus it can’t be a wave. As a result, the interference pattern on the wall won’t appear—the two lines will instead. Light will have acted as a particle merely because we put a camera in front of it. We physically change the outcome just by measuring it.

It’s called the Observer Effect, generally speaking, and though it’s a good way to end this article, it doesn’t even scratch the surface of crazy things to be found in physics. For example, there are a bunch of variations of the double slit experiment that are even more insane  than the one I talked about here. I encourage you to look them up, but only if you’re prepared to spend the whole day getting caught up in quantum mechanics.

There is nothing in Einstein’s theories of relativity to rule out time travel, although the very notion of traveling to the past violates one of the most fundamental premises of physics, that of causality. With the laws of cause and effect out the window, there naturally arises a number of inconsistencies associated with time travel, and listed here are some of those paradoxes which have given both scientist and time travel movie buffs alike more than a few sleepless nights over the years.

The Time travel paradoxes which follow fall into two broad categories, namely 1) Closed Causal Loops, such as the Predestination Paradox and the Bootstrap Paradox, which involve a self-existing time loop in which cause and effect run in a repeating circle, but is also internally consistent with the timeline’s history, and 2) Consistency Paradoxes, such as the Grandfather Paradox and other similar variants such as The Hitler paradox, and Polchinski’s Paradox, which generate a number of timeline inconsistencies related to the possibility of altering the past.

In this article we are going to discuss about Some Interesting Paradox of Time travel which are 100 % New For You ? let’s begin the article.

1: Predestination Paradox

Predestination Paradox

A Predestination Paradox occurs when the actions of a person traveling back in time becomes part of past events, and may ultimately causes the event he is trying to prevent to take place. This results in a ‘temporal causality loop’ in which Event 1 in the past influences Event 2 in the future (time travel to the past) which then causes Event 1 to occur, with this circular loop of events ensuring that history is not altered by the time traveler, and that any attempts to stop something from happening in the past will simply lead to the cause itself, instead of stopping it. This paradox suggests that things are always destined to turn out the same way, and that whatever has happened must happen.

Sound complicated? Imagine that your lover dies in a hit-and-run car accident, and you travel back in time to save her from her fate, only to find that on your way to the accident you are the one who accidentally runs her over. Your attempt to change the past has therefore resulted in a predestination paradox. One way of dealing with this type of paradox is to assume that the version of events you have experienced are already built into a self-consistent version of reality, and that by trying to alter the past you will only end up fulfilling your role in creating an event in history, not altering it. In The Time Machine (2002) movie, for instance, Dr. Alexander Hartdegen witnesss his fiancee being killed by a mugger, leading him to build a time machine to travel back in time to save her from her fate. His subsequent attempts to save her fail, though, leading him to conclude that “I could come back a thousand times… and see her die a thousand ways.” After then traveling centuries into the future to see if a solution has been found to the temporal problem, Hartdegen is told by the Über-Morlock:

“You built your time machine because of Emma’s death. If she had lived, it would never have existed, so how could you use your machine to go back and save her? You are the inescapable result of your tragedy, just as I am the inescapable result of you.”

Other examples of predestination paradoxes in the movies include 12 monkeys (1995), Time crimes (2007), The Travelers Wife (2009) , and predestination (2014).

2: Bootstrap Paradox

                                 Bootstrap Paradox

A Bootstrap paradox is a type of paradox in which an object, person, or piece of information sent back in time results in an infinite loop where the object has no discernible origin, and exists without ever being created. It is also known as an Ontological Paradox, as ontology is a branch of philosophy concerned with the nature of being, or existence. George Lucas traveling back in time and giving himself the scripts for the Star War movies which he then goes on to direct and gain great fame for would create a bootstrap paradox involving information, as the scripts have no true point of creation or origin. A bootstrap paradox involving a person could be, say, a 20 year old male time traveler who goes back 21 years, meets a woman, has an affair, and returns home three months later without knowing the woman was pregnant. Her child grows up to be the 20 year old time traveler, who travels back 21 years through time, meets a woman, and so on. American science fiction writer Robert Heinlein wrote a strange short story involving a sexual paradox in his 1959 classic “All You Zombies”.

These ontological paradoxes imply that the future, present and past are not defined, thus giving scientists an obvious problem on how to then pinpoint the “origin” of anything, a word customarily referring to the past, but now rendered meaningless. Further questions arise as to how the object/data was created, and by whom. Nevertheless, Einstein’s field equations allow for the possibility of closed time loops, with Kip Thorne the first theoretical physicist to recognize traversable wormholes and backwards time travel as being theoretically possible under certain conditions.

Examples of bootstrap paradoxes in the movies include Somewhere in Time (1980), Bill and Ted’s Excellent Adventure (1989), the Terminator movies, and Time Lapse (2014).

3: Grandfather Paradox

Grandfather Paradox

This time paradox gives rise to a ‘self-inconsistent solution’, because if you traveled to the past and killed your grandfather, you would never have been born and would not have been able to travel to the past- a paradox.  Let’s say you did decide to kill your grandfather because he created a dynasty that ruined the world. You figure if you knock him off before he meets your grandmother the whole family line (including you) will vanish and the world will be a better place. According to theoretical physicists, the situation could play out as follows:

Time line protection hypothesis: You pop back in time, walk up to him, and point a revolver at his head. You pull the trigger but the gun fails to fire. Click! Click! Click! The bullets in the chamber have dents in the firing caps. You point the gun elsewhere and pull the trigger. Bang! Point it at your grandfather.. Click! Click! Click! So you try another method to kill him, but that only leads to scars that in later life he attributed to the world’s worst mugger. You can do many things as long as they’re not fatal until you are chased off by a policeman.

Multiple universes hypothesis: You pop back in time, walk up to him, and point a revolver at his head. You pull the trigger and Boom! The deed is done. You return to the “present” but you never existed here. Everything about you has been erased, including your family, friends, home, possessions, bank account, and history. You’ve entered a timeline where you never existed. Scientists entertain the possibility that you have now created an alternate timeline or entered a parallel universe.

4: Let’s Kill Hitler Paradox

Let’s Kill Hitler Paradox

Similar to the Grandfather Paradox which paradoxically prevents your own birth, the Killing Hitler paradox erases your own reason for going back in time to kill him. Furthermore, while killing Grandpa might have a limited “butterfly effect”, killing Hitler would have far-reaching consequences for everyone in the world, even if only for the fact you studied him in school. The paradox itself arises from the idea that if you were successful, then there would be no reason to time travel in the first place. If you killed Hitler then none of his actions would trickle down through history and cause you to want to make the attempt.

By far the best treatment for this notion occurred in an a Twilight Zone episode called Cradle of Darkness that sums up the difficulties involved in trying to change history, with another being an episode of Dr Who called ‘Let’s Kill Hitler’.

5: Polchinski’s Paradox

American theoretical physicist Joseph Polchinski proposed a time paradox scenario in which a billiard ball enters a wormhole, and emerges out the other end in the past just in time to collide with its younger version and stop it going into the wormhole in the first place. Polchinski’s paradox is taken seriously by physicists, as there is nothing in Einstein’s General Relativity to rule out the possibility of time travel, closed time-like curves (CTCs), or tunnels through space-time. Furthermore, it has the advantage of being based upon the laws of motion, without having to refer to the indeterministic concept of free will, and so presents a better research method for scientists to think about the paradox.

When Joseph Polchinski proposed the paradox, he had Novikov’s Self-Consistency Principle in mind, which basically states that while time travel is possible, time paradoxes are forbidden. However, a number of solutions have been formulated to avoid the inconsistencies Polchinski suggested, which essentially involves the billiard ball delivering a blow which changes its younger version’s course, but not enough to stop it entering the wormhole. This solution is related to the ‘timeline-protection hypothesis’ which states that a probability distortion would occur in order to prevent a paradox from happening. This also helps explain why if you tried to time travel and murder your grandfather, something will always happen to make that impossible, thus preserving a consistent version of history.


6: Twin paradox

                          Twin paradox

In physics, the twin paradox is a thought experiment in special relativity involving identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more.

7: Fermi’s paradox

                                       Fermi's paradox

The Fermi paradox, or Fermi’s paradox, named after physicist Enrico Fermi, is the apparent contradiction between the lack of evidence and high probability estimates for the existence of extraterrestrial civilizations.


Are Self-fulfilling Prophecies Paradoxes?

A self-fulfilling prophecy is only a causality loop when the prophecy is truly known to happen and events in the future cause effects in the past, otherwise the phenomenon is not so much a paradox as a case of cause and effect.  Say,  for instance, an authority figure states that something is inevitable, proper, and true, convincing everyone through persuasive style. People, completely convinced through rhetoric, begin to behave as if the prediction were already true, and consequently bring it about through their actions. This might be seen best by an example where someone convincingly states:

“High-speed Magnetic Levitation Trains will dominate as the best form of transportation from the 21st Century onward.”

Jet travel, relying on diminishing fuel supplies, will be reserved for ocean crossing, and local flights will be a thing of the past. People now start planning on building networks of high-speed trains that run on electricity. Infrastructure gears up to supply the needed parts and the prediction becomes true not because it was truly inevitable (though it is a smart idea), but because people behaved as if it were true.

It even works on a smaller scale – the scale of individuals. The basic methodology for all those “self-help” books out in the world is that if you modify your thinking that you are successful (money, career, dating, etc.), then with the strengthening of that belief you start to behave like a successful person. People begin to notice and start to treat you like a successful person; it is a reinforcement/feedback loop and you actually become successful by behaving as if you were.

Are Time Paradoxes Inevitable?

The Butterfly Effect is a reference to Chaos Theory where seemingly trivial changes can have huge cascade reactions over long periods of time. Consequently, the Timeline corruption hypothesis states that time paradoxes are an unavoidable consequence of time travel, and even insignificant changes may be enough to alter history completely.

In one story, a paleontologist, with the help of a time travel device, travels back to the Jurassic Period to get photographs of Stegosaurus, Brachiosaurus, Ceratosaurus, and Allosaurus amongst other dinosaurs. He knows he can’t take samples so he just takes magnificent pictures from the fixed platform that is positioned precisely to not change anything about the environment. His assistant is about to pick a long blade of grass, but he stops him and explains how nothing must change because of their presence. They finish what they are doing and return to the present, but everything is gone. They reappear in a wild world with no humans, and no signs that they ever existed.. They fall to the floor of their platform, the only man-made thing in the whole world, and lament “Why? We didn’t change anything!” And there on the heel of the scientist’s shoe is a crushed butterfly.

The Butterfly Effect is also a movie, starring Ashton Kutcher as Evan Treborn and Amy Smart as Kayleigh Miller, where a troubled man has had blackouts during his youth, later explained by him traveling back into his own past and taking charge of his younger body briefly. The movie explores the issue of changing the timeline and how unintended consequences can propagate.


Scientists eager to avoid the paradoxes presented by time-travel have come up with a number of ingenious ways in which to present a more consistent version of reality, some of which have been touched upon here,  including:

The Solution: time travel is impossible because of the very paradox it creates.

Self-healing hypothesis: successfully altering events in the past will set off another set of events which will cause the present to remain the same.

The Multiverse or “many-worlds” hypothesis: an alternate parallel universe or timeline is created each time an event is altered in the past.

Erased timeline hypothesis: a person traveling to the past would exist in the new timeline, but have their own timeline erased.

Everything on earth follow the rules of physics but here we have collect some detail about those invention which were only invented to deny or break the rule of physics.

1. Hydrophobic Materials


Hydrophobic materials are special coverings that can protect against water, liquids, and even dirt. For years, these substances were only used in laboratories. Today, hydrophobic materials are more widely used by the general public. You can buy a spray or gel to protect your footwear, clothing, building materials, and even your tablecloths. Amazingly, this material has also been used to clean up the ocean. There is always research being done, and soon, this substance could be responsible for saving the planet

2. SF6 Gas


SF6 gas, also known as hexafluoride, is a gas which solid objects can float on as though they were in water. This gas is actually five times heavier than air. It won’t escape from its container and light objects can float on the gas. One very strange ability that this gas has is that is can lower the tone of your voice. If you take in a gulp of this gas, you will sound like Darth Vader from Star Wars. This gas makes you sound so funny, that Kelly Ripa and Neil Patrick Harris inhaled it on Kelly’s morning show. There are several YouTube videos to prove it.

3. Gallium



Many people believe that a metal that can melt in your hands is something out of a science fiction movie. There is actually such a substance, and it is called gallium. You may have seen liquid metal, often in your high school physics class, however, gallium will melt if you mix it with hot water. Its abilities don’t stop there, however, If it comes into contact with aluminum, the aluminum will become brittle. This substance is most frequently used in the high technology sector.

4. Nitinol


Everyone has heard of memory foam, where your pillow or your mattress will mold to the shape of your body or your head. What you may not know is that there is actually a memory metal called nitinol. It is actually a nickel and titanium alloy. If you bend this metal, it will return to its original form when it is heated up. It is pretty impressive.

5. Smart Wood

             smart wood

Smart Wood is going to be very popular in the future. It is actually a programmable wood. Researchers at the Massachusetts Institute of Technology used 4D printing to create wooden laminates that change to the shape that you need when they are submerged in water. This Smart Wood could one day change the face of construction. One day, cutting a measuring may no longer be necessary during building projects.

6. Hot Ice

                 Hot Ice

The word hot ice seems like an oxymoron but it is actually one of the substances that defy the laws of physics. The scientific name for this substance is sodium acetate. When the slightest influence is placed upon the substance, it will turn from a liquid into crystals, the same way that ice does. The only difference is that this substance is warm, unlike ice. This is actually a substance that you can make yourself. It doesn’t serve much of a purpose in your everyday life, however, it really is pretty cool.

7. Hydrogel


Hydrogel has been used in medical applications, and it has actually helped medical researchers make huge strides. It can actually change its shape and size based on the temperature. If you watch this material closely when it is going through its transformation, it will look as though it is alive. It is actually one of the most amazing substances on Earth. If you have the chance to see it in action, you should take advantage of it. You may not get another chance.

8. Self-Repairing Material

                       self repairing material

This is likely one of the most amazing substances on the planet. It is impossible to harm the material, as it can repair itself quickly. Deep within the material lie microcapsules of bacteria. When the item encased in the material is damaged, the bacteria becomes activated, filling in the cracks. This material is already used in building materials, for medical purposes, and on Smartphone covers. Researchers are currently trying to find a way to use this material on the asphalt on roads. This will make potholes and cracks a thing of the past. This can save towns, cities, counties, and states hundreds of thousands of dollars on road repairs.

9. Aerogel


Aerogel is amazing as it is 7.5 times lighter than air. It is also transparent, hard, flame-resistant, and it can hold in heat extremely well. It is also one of the most expensive substances in the world. It has an amazing appearance, as it actually resembles a hologram. Most people have never heard of this substance until recently, however, it was discovered in the late 1930’s by a chemist named Samuel S. Kistler. If you were to buy a piece the size of your palm, you can expect to pay $100. It is also known as Stardust, and it is most commonly used by NASA. Over the past few years, more and more companies have been testing this material to for use in everyday objects. It’s most famous job thus far has been in the twin Mars Exploration Rovers. They landed on Mars in early 2004 and the aerogel protected the electronics, the computers, and the electrical box.

10. Nitrogen Triiodide and Fulminating Silver

                   Nitrogen Triiodide and Fulminating Silver

This substance actually has no true purpose. This is likely because it is very dangerous to transport. The problem with this substance is when it is struck, no matter how lightly, it can explode. What makes this substance so impressive is that when it explodes, it turns into a brightly colored smoke. It could make a magician’s show amazing if they could get their hands on this substance, but chances are most magicians won’t know where to find it. It isn’t available for purchase in every magic store because it is so dangerous. It also has no useful purpose in the industrial or medical field.

  10 Substances Only Invented To Broke The Rules Of Physics


We all have read hundreds of web article and video about time travel and some interesting ways or method to do time travel in correct way in real life.
Then we are here, in this web article we are now going to talk about the some of the top amazing and interesting ways to do time travel.
So without wasting our time let’s get into the post.

Time travel, a most discussing topic in the field of science. Time travel is most mysterious due to it’s  impossibilities in nature. There are numerous ways explained in theory to do time travel in real practical life.

In our countdown we have collect Top 10 METHOD TO DO TIME TRAVEL, So let’s begin.

1: Travel  Very Fast

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Einstein showed time was flexible and could be affected by speed, with his Theory of Relativity showing that as you approach the speed of light (186,282 miles per second) time slows down. Astronauts on board the International Space Station traveling at 17,000 miles per hour, for instance,  age 0.014 seconds less than earthbound humans every year. Relativistic time travel even rears its head for the constellation of GPS satellites. If it wasn’t for automatic corrections built into the system, geolocation would be inaccurate by as much as 6 miles (10 km) a day.


2: Superstrings

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If superstrings exist, one with the diameter of a proton and 1.6 kms long would weigh as much as the entire planet Earth. If you can arrange to have two of these side by side and start orbiting the two strings in a figure-eight pattern, through some very esoteric and complex mathematical operations this would allow you to travel forward or backward in time, to transmit matter from point to point, or a travel to any point that you could calculate. The funny thing is the strings would have minimal gravity despite their mass as long as they were straight. If they were formed into loops they would possess the full gravity of our planet. However, no matter how intimidating the mathematics, there’s still no evidence that superstrings exist. They’re still a theoretical construct to explain some phenomena that we don’t completely understand yet.


3: Build A faster-than-light (FTL) Machine

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Going very fast will help you travel marginally into the future, but building a machine that travels faster-than-light (FTL) will take your time traveling odyssey to a whole new level. Of course there’s the slight problem that the fastest ever human-made object, the New Horizons probe, launched in 2006 at a speed of just 36,373 mph although it did attain a velocity of more than 52,000 miles per hour while in Jupiter’s gravitational field. This, obviously, is a far cry from the 671 million mph that light travels. Nevertheless, if possible, traveling at 99% the speed of light would mean you would experience 1 year on board your FTL craft for roughly every 7 back on earth, while at 99.999% the speed of light that figure rises to 223 years back on Earth. Some have speculated that exceeding the speed of light might actually cause time to reverse. Of course there’s the problem that when you attain 99.999 the speed of light your mass becomes infinite and it becomes impossible to accelerate any further.

4: Look Back in Time

Image result for Look Back in Time

FTL travel could also present us with the intriguing theoretically possibility of traveling four light-hours away from Earth, turning around and watching the light from Earth 4 hours ago arrive. We would essentially be watching 4 hours of history from Earth being replayed as its light arrived. Even now, there’s nothing to preclude us looking back through time to observe events from long ago. Every time you gaze out that the stars you’re looking at history; you’re looking at things that occurred thousands or hundreds of thousands of years ago. With a good telescope you can watch things that happened millions of years ago. If you just want to look into the past 4.24 years you can look at the closest star (after the Sun) to the planet Earth. It’s part of a triple star system, and its name is  Proxima Centauri . The next separate star system has a sun named Barnard’s Star which is 9 ½ light years away. So by focusing our attention on either of these two systems you can look 4 ¼ years into the past or 9 ½ years into the past, respectively.

5: Warp Drive

Image result for Warp Drive

Warp Drive, as described by theoretical physicist Miguel Alcubierre, involves moving a bubble of space-time through a relativistic framework. Unfortunately for time travel enthusiasts you are now moving in a non-relativistic way, and you may have two separate time frames, but they’re both running at the same rate. If it takes an hour to get to Pluto, an hour of time passes back on Earth. In other words, you may have traveled vast distances through space, but your time has still remained the same.

6: Wormholes

Image result for Wormholes

A wormhole is a hypothetical passage in space-time connecting two separate points, thus giving the traveler the chance to traverse potentially astronomical distances instantaneously. Furthermore, general relativity predicts that if traversable wormholes do spontaneously exist, they could permit time travel through relativistic time dilation. However, there is no way to predict where the other end of them would be. Worse yet, theories seem to indicate it would be a one-use sort of thing, collapsing behind you as you pass through it. If it went anywhere, that would be the end of the journey – there would be no hope of return, and no way for someone to follow. We don’t currently possess or understand a method for generating a wormhole, but current estimates suggest that we would need the output of an entire sun to create one. With only one Sun in our solar system, which happens to be in use of the moment, I suggest this is not very practical, completely aside from the fact that we don’t know how to harness it.

7: Black Holes

Image result for Black Holes

Einstein discovered that gravity from massive object cause time to slow down. Therefore, while black holes will simply crush anything that enters them, by staying outside of its event horizon you could travel years into the future relative to an observer beyond its gravitational field, while for you just a few days would have elapsed.

8: Neutron Stars

Image result for Neutron Stars

Neutron stars spin very quickly. The fastest one found in our galaxy rotates at to 716 times per second, which is approaching 25% the speed of light. If a spinning neutron star were to collapse to a black hole the centrifugal effect might very well cause it to form a ring of protons that do not collapse to a singularity. This “spinning doughnut” might not stretch you out into an infinitely long piece of spaghetti, but rather cause a rupture in the space-time continuum at the nexus of that doughnut. The other end might spontaneously form at another weak point elsewhere in the galaxy. There are six readily apparent possibilities.; you are ripped to shreds, you get stuck forever, you end up outside our galaxy, you exit in the future, you exit in the past, you exit in a parallel universe where our laws of physics don’t apply and you would simply cease to exist as your atoms ceased to obey the laws of your universe and started to obey the laws of the other universe.

9: A Leisurely One Second Per Second

Image result for One Second Per Second

People who say that time travel is impossible should think again. After all, we’re all time travelers, scooting along through the space-time continuum at a rate of one second per second. Now it’s generally accepted that time travel is a one way trip, only going forward, and there may be some truth to that, but that’s not guaranteed and it would be fun to imagine traveling at a faster rate to investigate the future, or even going against the flow of time to investigate the past, which leads onto our next method of time travel.

10: Different Dimensions

Image result for Different Dimensions

We can add a whole new dimension to the discussion; seven of them in fact! Quantum theory currently requires 10 dimensions, or 11 if you include time, in order to describe itself. But where are they? You can see lengths, you can see widths, you can see heights; they are perfectly obvious. The fourth dimension is duration, or time. So where are the seven other dimensions? Picture these dimensions as flower petals that haven’t unfurled. They’re tightly held at the corners of all the other dimensions. If there was another direction you could travel other than up, down, left, right, forward, or back, it would be quantified by one of these dimensions.

One of the most interesting and most mysterious method of time travel ” The Time Slip”

( Click here to read about ‘ Time Slip ‘ )

Robert A. Heinlein, both a scientist and a science fiction writer, wrote a book titled Number of the Beast. In his novel one of the protagonists created a device where he could swap one dimension for another. People in the book would continue to perceive three dimensions but if you traveled along this new dimension that might have taken the place of “length” you could travel into the future, or into the past. Other dimensional swaps would allow you to transit to parallel universes, while another would allow you to transit to a different physical location in the blink of an eye.

Maybe he was on to something. Maybe it is as simple as swapping one dimension for another. We’re basically four dimensional creatures. We can handle length, width, depth, and time. Maybe by rotating out one dimension and rotating in another we can accomplish anything. The secret is to let quantum physicists figure out how to make it actually work. It might only require knowledge and a very tiny expenditure of energy. You could step into a “booth” in your home, twist a knob, and step out of the booth, halfway around the world, in a fancy restaurant, or in a lunar base on the far side of the Moon, ready for a night’s observation. Think it unlikely? At this point it makes sense to refer to one more of Arthur C. Clarke’s laws.

Clarke’s Third Law: Any sufficiently advanced technology is indistinguishable from magic.

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:- Time slip is a phenomenon in which you reach to another time by the slipping of time cycle.

For example : ” You visit a shopping mall weekly which is near your house. Always you take your haircut inside the mall salon. But one day when you came outside from the mall you see a new salon, and you think to take haircut at that new salon. You like the haircut of that salon so you decide to you will always take haircut at that salon which is outside of the mall. After one week you visit that same place but you didn’t see any salon and you ask to people that where is salon, which is at that place ? Then all people say here is no any salon but about 10 years ago there is one salon. This concludes that you goes back to the 10 year past.”

Till today science haven’t proved that time slip is possible or not ! but there are many people who feel time slip for short time.

  • In 2006, a SEAN named thief was robbing a shop of Liverpool island and a security guard was chasing him at the road. After sometime SEAN got chest pain and fell down due to pain but when he rise his head from the bowing down position he see everything is changed, house ,road were completely changed,security guard was vanished who is chasing him and he see 1900’s people , clothes & old designed vehicles. Then he ran to the newspaper shop and see that days date, he get so surprised at that day date is 1967. It means he came back to 39 year past. Later security guard tell that , thief automatically vanished from the road.

This is real incidence which shows the mysterious ways of time travel.

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Thank you for giving your valuable time.

According to the theory of relativity, time dilation is a difference in the elapsed time measured by two observers, either due to a velocity difference relative to each other, or by being differently situated relative to a gravitational field. As a result of the nature ofspacetime , a clock that is moving relative to an observer will be measured to tick slower than a clock that is at rest in the observer’s own frame of reference. A clock that is under the influence of a stronger gravitational field than an observer’s will also be measured to tick slower than the observer’s own clock.
Such time dilation has been repeatedly demonstrated, for instance by small disparities in a pair of atomic clock after one of them is sent on a space trip, or by clocks on the Space shuttle  running slightly slower than reference clocks on Earth, or clocks on GPS & Galileo satellites running slightly faster . Time dilation has also been the subject of science fiction works, as it technically provides the means for forward Time Travel.
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