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Special relativity: Michelson Morley experiment and muon decay

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    A few questions about these topics:

    Michelson Morley experiment
    • How was it supposed to detct absolute motion/what has the experiment got to do with absolute motion?
    • How did it prove the invarience of the speed of light?

    I know that when they rotated the set-up they found no change in the interference pattern, but I cant see the link with absolute motion/invariance of speed of light?

    Muon decay
    • How was this evidence for time dilation?

    Would really appreciate some explanations, just revising my weaker topics for my exam next week

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    (Original post by number23)
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    i know the set-up i just dont understand the conclusions


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