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Oct 22, 2019 at 16:12 answer added Mohammad Javanshiry timeline score: 1
Oct 22, 2019 at 16:12 comment added Dast You have accounted for only the Lorentz contraction (as far as I can tell). In frame S not only is the distance between B and the mirror contracted, but also the beam splitter (B) and mirrors are all moving. So the light that goes "up" to the top mirror actually does a triangular path in that frame (IE has to go further) and the light going to the other mirror first has to catch up to it (the mirror is "running away").
Oct 22, 2019 at 15:55 history edited Big Brother CC BY-SA 4.0
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Oct 22, 2019 at 15:39 history asked Big Brother CC BY-SA 4.0