In one-dimensional world (2-D relativistic space-time)
astronomer observs UFO flying by at speed 1.5c.
What is the speed of astronomer as seen by the
pilot of the UFO?
2007-05-24 08:56:52 · 3 answers · asked by Alexander 6 in Science & Mathematics ➔ Physics
The same, 1.5c
2007-05-24 09:02:19 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The whole point of relativity is that c is the limit. anything above it will violate causality - meaning things would happen before they started, (like a cup breaking before it falls to the ground). If by magic, the UFO accelerated up past the speed light, due to time dilation, his time would run backwards and thus light would not emerge from the spacecraft but go backwards in his frame of reference, so no-one would be able to see him at all.
2007-05-24 16:37:53 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1.5c
Velocity is always relative. But it's not at all clear that either of them -could- measure the speed of the other.
Doug
2007-05-24 16:03:05 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋