Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Light orbiting black holes

  1. Jun 16, 2017 #1


    User Avatar

    light orbiting black holes
    If light can orbit a black hole, and it is continuously coming in from every direction, wouldn't it get "crowded" in there over billions of years?
  2. jcsd
  3. Jun 16, 2017 #2


    User Avatar

    Staff: Mentor

    Those orbits are not stable and the light will fall into the black hole as a result of even the tiniest gravitational disturbance. Since objects in the universe are always moving around, these disturbances happen constantly, so it never has a chance to build up.
  4. Jun 18, 2017 #3

    stefan r

    User Avatar
    Gold Member

    Light that is "coming into the black hole" will always spiral in. The only photons that could have a stable orbit are created (or reflected) at the orbital radius. Then what Drakkith said applies to that too.
  5. Jun 18, 2017 #4
    Yes it gets crowded and the result of that is a quasar
  6. Jun 22, 2017 #5


    User Avatar
    Science Advisor
    Gold Member

    The photonsphere of a black hole is merely an illusion. It has no physicality and is no more real than a rainbow.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted