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klen
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[this thread was split off from https://www.physicsforums.com/threads/confusion-in-general-relativity.840710/]
I read that Einstein gave the following argument:
If we look at a rotating (and hence accelerated) frame from an Inertial frame, which is supposed to be away from all gravitational forces, then looking from the inertial frame we can see that any circle drawn on the rotating plane will have its circumference contracted (due to lorentz contraction) but not is diameter so we are not going to see the ratio of circumference to diameter to be pi. Doesn't this mean that space is curved?
I read that Einstein gave the following argument:
If we look at a rotating (and hence accelerated) frame from an Inertial frame, which is supposed to be away from all gravitational forces, then looking from the inertial frame we can see that any circle drawn on the rotating plane will have its circumference contracted (due to lorentz contraction) but not is diameter so we are not going to see the ratio of circumference to diameter to be pi. Doesn't this mean that space is curved?
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