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  1. F

    Speed of massless objects

    Yes. Exactly. Photon emits. Photon strikes object. No time in between. Again, I concur. At C, time stops. However, at the time of the thought experiment, Einstein could not know that, because he hadn't discovered it yet. This led him into error. In discovering and correcting that error, he...
  2. F

    Speed of massless objects

    I have always assumed the photon 'sees' things as Scott described. At least, since I wrapped my head around time dilation. And have wondered about the point of view of a gravity wave. Wondered too, if gravity wave is not a contradiction in terms. Regarding ...
  3. F

    Mass and thermodynamics in relativity

    If the spring stores energy, then it stores mass.
  4. F

    Mass and thermodynamics in relativity

    Is WRT a standard physics expression? Of what? And isn't the actual input of energy the initial squeeze or stretch, and not the cycling of balls? Isn't that that the actual source of mass under discussion? And if it is so that the Balls change mass as each is shuffled to and fro in...
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