Quote (Krypto @ 4 May 2011 11:13)

You can't go back in time as you can't go faster than the speed of light. And if it was remotely even possible, you could only see ''images'' and you couldnt interact with it.

But the real question is: Does it really matter?

Quote (TIMMY213 @ 4 May 2011 03:53)

Yes. Relativistic effects are observable, and failing to take them into account in high velocity applications leads to significant errors. For example, GPS relies on the software taking into account relativity to obtain an accurate result. Another example: Muons (similar to an electron except much heavier) are created from cosmic rays interacting with our atmosphere. Because they are travelling so quickly, they reach the earth's surface before they decay. Without the relativistic effect of speed contracting the distance/extending their time they would decay long before getting anywhere near (A half life of 2.2 microseconds).

Quote (murder567 @ Apr 30 2011 07:25pm)

Not true.

Time is relative.
If you travel faster than light speed you go back in time.
If you travel at light speed you go forward in time (actually if you travel any speed you are going forward in time...but the faster the speed the faster time passes for you relative to an observer).

When you go the speed of light there is no concept of time relative to you.
If you travel at the speed of light for 10 years, relative to an observer on Earth, no time would have passed for you but 10 years would pass on Earth.
If you travel faster than the speed of light then you go backwards in time.

Hmm I guess you can think of it like time moves at the speed of light.
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