- #1
jhe1984
- 100
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Hi,
In Hawking's A Brief History of the Universe, he describes a scenario in which it is possible to travel "back" in time. He says, if faster-than-light time travel is possible, it would then be possible to see a race in one location in space, travel to another part of space to relate the news, and arrive back all before the race actually ends (I'm possibly misrepresenting the description, but i don't think it affects question).
How can this be if a person had to exist in Point A for 1 second (assumed time it takes to observe and process event), travel at beyond-light speed to Point B, exist long enough to explain the answer (assumed explanation to conclusion time is also 1 sec) and then travel back to original point A in under 2 seconds?
I am probably misunderstanding the concept of relativity but if you wouldn't mind enlightening me, I'd be much obliged.
In Hawking's A Brief History of the Universe, he describes a scenario in which it is possible to travel "back" in time. He says, if faster-than-light time travel is possible, it would then be possible to see a race in one location in space, travel to another part of space to relate the news, and arrive back all before the race actually ends (I'm possibly misrepresenting the description, but i don't think it affects question).
How can this be if a person had to exist in Point A for 1 second (assumed time it takes to observe and process event), travel at beyond-light speed to Point B, exist long enough to explain the answer (assumed explanation to conclusion time is also 1 sec) and then travel back to original point A in under 2 seconds?
I am probably misunderstanding the concept of relativity but if you wouldn't mind enlightening me, I'd be much obliged.