Time travel
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Time travel

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This is about time travelling .....

This is about time travelling ..

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  • 1. &quot;The Universe isn't stranger than we can imagine, its stranger than we can't imagine.&quot;
  • 2.
    10/27/11 TIME TRAVEL
  • 3.
    • The things in our daily life have height, width and length.
    • According to many researchers, we can't see the fourth dimension, or any other dimension beyond that.
    • Physicists work under the assumption that there are at least 10 dimensions, but the majority of us will never &quot;see&quot; them. Because we only know life in 3-D, our brains don't understand how to look for anything more.
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  • 4.
    • In physics, spacetime is any mathematical model that combines space and time into a single continuum.
    • Spacetime is usually interpreted with space as being three-dimensional and time playing the role of a fourth dimension that is of a different sort from the spatial dimensions.
    • By combining space and time into a single manifold, physicists have significantly simplified a large number of physical theories, as well as described in a more uniform way the workings of the universe at both the super galactic and subatomic levels.
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  • 6.
    •   Light travels at about 300,000 kilometers per second (186,000 miles per second) -- that's pretty fast.
    • We see the moon as it was 1.3 seconds ago; the sun as it was 8.3 minutes ago; the nearest star 4.2 years ago; the most distant galaxy as it was about 13.3 billion years ago. The most distant object you can see with your naked eye is the Andromeda Galaxy and even that is about 2.3 million light-years away, which means you see it as it was 2.3 million years ago.
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  • 7.
    • Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space.
    • Either sending objects backwards in time to some moment before the present, or sending objects forward from the present to the future without the need to experience the intervening period 
    • The action of traveling through time into the past or the future
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  • 8.
    • “ Some theories, most notably special and general relativity, suggest that suitable geometries of space-time, or specific types of motion in space, might allow time travel into the past and future if these geometries or motions are possible.
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  • 10.
    • We would require that you move faster than the speed of light, but we know that this cannot be done.
    • would require space-time to be very warped and a sort of &quot;tunnel&quot; between two space-time points to be present (called a &quot;wormhole&quot;).
    • Such tunnels would not last long enough on their own for anyone to travel through them (unless the traveler discovered some way or built some machine which would keep the tunnel open).
    • There are all sorts of other conditions which would have to be imposed on space-time in order for human beings to travel into the past.  
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  • 12.
    • A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull.
    • The speed with which you need to throw the rock in order that it just barely escapes the planet's gravity is called the &quot;escape velocity.“
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  • 13.
    • Now imagine an object with such an enormous concentration of mass in such a small radius that its escape velocity was greater than the velocity of light. Then, since nothing can go faster than light, nothing can escape the object's gravitational field. Even a beam of light would be pulled back by gravity and would be unable to escape.
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  • 14.
    •   A black hole has something called an 'event horizon.' This is a spherical surface that marks the boundary of the black hole. You can pass in through the horizon, but you can't get back out.
    • The horizon as the place where the escape velocity equals the velocity of light.
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  • 15.
    •   Outside of the horizon, the escape velocity is less than the speed of light, so if you fire your rockets hard enough, you can give yourself enough energy to get away.
    • But if you find yourself inside the horizon, then no matter how powerful your rockets are, you can't escape.
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  • 17.
    • A black hole is a region of space from which nothing can escape, the time-reversed version of a black hole is a region of space into which nothing can fall.
    • In fact, just as a black hole can only suck things in, a white hole can only spit things out.
    • It is theoretically possible for a traveler to enter a rotating black hole, avoid the singularity, and travel into a rotating white hole which allows the traveler to escape into another universe.
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  • 19.
    • A  wormhole  is a hypothetical topological feature of spacetime that would be, fundamentally, a &quot;shortcut&quot; through spacetime.
    • The interior of a charged or rotating black hole can &quot;join up&quot; with a corresponding white hole in such a way that you can fall into the black hole and pop out of the white hole. This combination of black and white holes is called a wormhole.
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  • 22.
    • Time dilation is an observed difference of elapsed time between two events as measured by observers either moving relative to each other or differently situated from gravitational masses.
    • An accurate clock at rest with respect to one observer may be measured to tick at a different rate when compared to a second observer's own equally accurate clocks.
    • This effect arises not from technical aspects of the clocks nor from the fact that signals need time to propagate, but from the nature of space-time itself.
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  • 24.
    • Time and distance are relative to each other.
    • As you travel close to the speed of light, the distance become shortened and while time becomes lengthened.
    • For a person travelling at 99% of velocity of light, time slows by 7 factor. 1 year is equivalent to 7 years for observer from earth.
    • For 99.999% its about 230 years
    • For a velocity of light the time factor becomes zero
    • When it crosses the velocity of light the time becomes reduced and runs in reverse time factor.
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  • 27.
    • The multiverse is a theory in which our universe is not the only one, but states that many universes exist parallel to each other. These distinct universes within the multiverse theory are called parallel universes.
    • Parallel universes basically say that space is so big that the rules of probability imply that surely, somewhere else out there, are other planets exactly like Earth.
    • In fact, an infinite universe would have infinitely many planets, and on some of them, the events that play out would be virtually identical to those on our own Earth.
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  • 29.
    • The “false vacuum” began to decay, creating amazing amounts of particles. These particles are the same as those which began our universe.
    • There are two main ideas as to what these different universes may contain. The first is that these universes are the same in matter and physical laws as our universe . For example, the oceans would be where our continents are and vice versa, on and on.
    • The second idea is that the other worlds would potentially be different in that they may not operate in the same way as ours does . A three dimensional world may not be what the norm is.
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  • 30.
    • If, as humans, we were able to tap into the power of traveling to these other universes, we would be able to ‘meet’ our other selves
    • If your own individual beings could meet and each one had different experiences, think of the intelligence and knowledge you could pass from one to another.
    • Each one would have different experiences and different outcomes.
    • In one world you could be a doctor, in another world a politician, in another world a drug addict. The options would be virtually limitless.
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  • 31.
    • Nothing in the world is supposed to travel faster than light.
    • But some neutrinos set off from Geneva and reached a lab beneath the mountains in Italy 60 nanoseconds (billionth of a second) faster than light would have, travelling a distance of 730 km. (I.e. About 12 Billion kms /sec)
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  • 32.
    • The news turned the world of physics upside down.
    • To be precise, it would turn the world of physics upside down if the measurements prove correct.
    • Apart from many consequences to the currently-tested laws of physics, it could lead to time travel.
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