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Black holes and mass of light

  1. Jul 23, 2009 #1
    First of all, I have to say that i'm not sure if my post is on the good forum. If there's any problem about that, just tell me where i should post it.

    So my question is, why light can de be absorb by black holes if light has no mass. I mean if black holes have enormus gravitational force it still need to have an object with mass to be absorb?

  2. jcsd
  3. Jul 23, 2009 #2


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    In general relativity (the more modern theory of gravity) mass/energy (such as a black hole) curves spacetime. Things (particles, photons, etc.) follow paths in the curved spacetime. This can be manifest as a black hole absorbing light. No photon mass is necessary.
  4. Jul 23, 2009 #3
    Um...I think this was an easy one for you. Thanks. I will review Einstein Theory of relativity.
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