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Yet another Blackhole question

  1. Feb 3, 2010 #1
    How does the gravity affect of a black hole pull in light?

    aren't photons massless?
  2. jcsd
  3. Feb 3, 2010 #2


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    In relativity, gravity curves spacetime, and particles (massless and non-massless) follow the shortest paths in that curved spacetime. Therefore, gravity effects photons.
  4. Feb 3, 2010 #3


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    Yes, as nicksauce points out, gravity does not pull things; gravity is simply a curve in spacetime. Photons follow this curve, just like massive particles do.
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