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Rubber sheet analogy - density change

  1. Jul 17, 2009 #1
    When the rubber sheet with the bowling ball in it stretches, the density of the rubber is lowered as the rubber molecules become more widely separated by empty space. Are there particles of space time(?) that are similarily separated by more empty space when when the amount of nearby mass(?) changes?
  2. jcsd
  3. Jul 17, 2009 #2


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    Gold Member

    No. You are stretching the rubber sheet analogy too far.

  4. Jul 17, 2009 #3
  5. Jul 17, 2009 #4


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    Science Advisor

    The rubber sheet usually represents only space, and is therefore misleading. See post #4 in this thread:
    The distances along space-time dimensions (the metric) change. Space-time is "streched" but there are no "particles of space time" in the model. It is a smooth manifold with a intrinsic curvature, and free falling objects are moving on geodesic paths.
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