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

I Energy emission from black holes

  1. Jan 31, 2017 #1
    My understanding is that once light or anything else crosses the event horizon, it will not re-emerge. However, we detect high energy beams of radiation coming from opposite sides of some of the celestial bodies that I have been told are types of black holes. Obviously I'm missing something here.
     
  2. jcsd
  3. Jan 31, 2017 #2

    phyzguy

    User Avatar
    Science Advisor

    The radiation we see coming from black holes is emitted from outside the event horizon. As gas falls into the black hole, it gains gravitational potential energy and gets hot, causing it to radiate. The radiation is emitted before the gas crosses the event horizon.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Energy emission from black holes
  1. Black Hole Energy (Replies: 17)

Loading...