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Old 03-16-2006, 01:22 PM   #12
Choobus
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A proper description of gravity waves would include the structure of spacetime, which is unknown and is the subject of quantum gravity and string theories. None of these theories have been tested. Relativity does predict gravity waves, but there is much that is not known about them. They have never been detected so they might not even exist. If they do exist they would be more like a water wave than a light wave. That is, they don't need a messanger particle because they travel via a medium (just as light was once thought to travel through the luminiferous ether). So spacetime itself modulates the wave, but nothing actually moves. This is totally different from the kinds of waver the QM talks about, which have no medium and are therefore amenable to both wave and particle descriptions.

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