Speeds don't make geometries non-Euclidean, acceleration does. One can go as close to the speed of light as one wishes and will still see the Euclidean (Minkowskian) geometry as long as she is freely falling.
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Constant speed rotation is acceleration
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More on the Ehrenfest Paradox here: https://en.wikipedia.org/wiki/Ehrenfest_paradox … ---
#EhrenfestParadoxpic.twitter.com/l0NzdBXHaM
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I think your conclusion is a bit too strong here. Should be something like "and thus the simple euclidean picture of scaling present in SRT does not work for general (accelerated) motions"
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Special relativity thought experiments can be “unbounded” - the Lorentz transformation of the circumference with v=c is what would “appear” to be from the view at the center, but the view at the periphery would still “appear” to be the actual Euclidean or “proper value.”pic.twitter.com/mVzFLcDX5b
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Just read this in
@WalterIsaacson 's book on Einstein last week. If the@fermatslibrary team could align your updates to his chapters, I'm sure my retention will improve! :-) -
That book is amazing!
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You'll have to pardon my ignorance here..."Since the radius is always orthogonal to the direction of motion it will not contract". ? This is because Lorentz Contraction happens only in the direction of motion....correct?
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Yes, but only from the point of view of someone not on the spinning disk
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lol.... if a disk is spun, it will contract in size? But only at near the speed of light? In other words its theoretical? Pondering wild theory seems nonsensical. Back in reality, when you spin a disc, it does not shrink in size.
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You spun one at close to the speed of light?
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