Speed of light and Time travel?

Question

If anything will travel as faster than the light, whil it go back in time?

Answer 1

In the Special Theory of Relativity, published in 1905, Albert Einstein stated that nothing could travel faster than the speed of light. Furthermore, only particles with zero mass, such as photons and possibly neutrinos (which may have a very small non-zero rest mass), can travel at the speed of light. Hence, it is impossible to travel faster than the speed of light and, what’s more, near light speed, travel will result in time dilated travel into the future. I will try to explain!

Einstein published his Theory of General Relativity in 1915 but it was not until the late nineteen forties that, the Austrian mathematician, Kurt Gödel found a time travel possibility within a solution to some relativistic equations. He found, that if the universe is rotating then time travel in both directions should be possible. By both directions, I mean, into the past and back or into the future and back. Alas, recent observational work used to study the cosmic background radiation has indicated that the universe has not rotated significantly since its creation. Hence, time travel into the past would appear to be impossible.

However, Einstein's theory of Special Relativity allows 'time-dilated' travel into the future. If an astronaut sets off on a journey travelling at a high percentage of the speed of light, then his on board clock will run more slowly than an equivalent clock here on Earth. Thus, when the high-speed traveller returns after a few years of his elapsed time; here on Earth many hundreds of years may have elapsed. The time dilation equation is given below: -

t(Earth) = t(traveller)

..............._________

...............√(1 - (v/c)²)

Where 'c' is the speed of light and 'v' the traveller's velocity, which may be expressed as a percentage of the speed of light ((say) 0.99999c).

Therefore, to summarise, the answer appears to be that you cannot travel through time into the past but you can travel into the future - at least theoretically!  

Answer 2

Prevailing theory suggests that it is impossible to exceed the speed of light, and if we're talking about a particle with mass, it is impossible even to reach it.

It is a popular "common sense" theory that since time "dilates" as you approach the speed of light, and ceases to have meaning at the speed of light (it does not, contrary to popular opinion, "stop"), that naturally, time would start flowing backwards beyond the speed of light.

In actuality, there is no theoretical basis for this. Einstein's Special Theory of Relativity involves equations that build up to the speed of light, and become singular at that point (meaningless). There are no particles that exceed the speed of light even under serious theoretical or experimental scrutiny at this time.

Answer 3

It's a only a theory,don't think it will be proved either,if you went that fast every atom in your body would dematerialise,maybe if someone invented the teleporter it would be possible.

Answer 4

i think thats the generally accepted understanding, but in order to go faster than light, you need more than infinite energy....

Answer 5

Google it, I'm too tired to answer that

Answer 6

No basically If you travel in a straight line at the speed of light away from the earth, then come back again, time would have gone faster for people on earth then it would have for you!   so everyone you knew would be old!

dont think its possible to go back! But im sure there are some theories flying around.