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Doppler effects on gravity - Page 2 — Parallax Forums

Doppler effects on gravity

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  • william chanwilliam chan Posts: 1,326
    edited 2008-03-15 10:07
    Steven,

    What I was trying to explain about the vase is that, if at any point of time during the video recording, all the velocities of all the molecules could somehow be reversed,
    they would combine as in the reversed video to form back the vase. I must stress again that it will indeed form a physical vase, no physics laws are broken during the vase making process.

    You are right, the amount of energy needed to reverse all the molecule's velocities it equal or less than the potential energy of the vase before the drop.
    No additional energy is used to create the disordered pieces into a beautiful vase.

    In modern theoretical physics, all classical physics laws including the General Theory of Relativity are not expected hold in all situations.

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  • JavalinJavalin Posts: 892
    edited 2008-03-20 10:16
    "There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.There is another theory which states that this has already happened." - Douglas Adams
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2008-03-20 11:21
    Maybe the person who understands just disappears. Arthur C. Clarke just past away.

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  • stevenmess2004stevenmess2004 Posts: 1,102
    edited 2008-03-20 11:29
    William,

    I haven't had time to track this down yet but I believe that this is not the case. I *think* that when you break the atoms in a molecule apart some electro-magnetic energy (e.g. light or x-ray) is also given off.

    Surely they can measure this (your theory) in the particle accelerators. I believe that some of the electron accelerators can reach speeds of 0.9c although I don't know how accurately they can measure the speed of the electrons.
  • william chanwilliam chan Posts: 1,326
    edited 2008-03-20 14:14
    Steven,

    I think you are referring to experiments to confirm repulsive gravity.
    Reply : It is easy to accelerate an electron to 0.9c, but it is currently impossible to measure the gravitational pull (or push) of one electron due to it's small mass.

    That's why we have to use galaxies as our laboratory.

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