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I Is my thought right or wrong? Light and a moving observer

  1. Nov 19, 2017 #26


    Staff: Mentor

    Yes. And according to GR, both viewpoints are valid.
  2. Nov 20, 2017 #27


    User Avatar
    Science Advisor

    At any given instant, it may be taken to be moving or not as one pleases. There is no inertial frame in which it is continuously at rest. But that's not the same thing as saying that it is always moving.
  3. Nov 21, 2017 #28
    About the OP, I got a shortcut answer.

    Let's get practical! The speed of light one way is impossible to measure, and the OP assumes that it is. In real life, we will never have to solve that kind of problem, because we will never face it, so it is no use to study it.
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