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

Black hole escape

  1. Nov 30, 2009 #1
    Would is be possible for electromagnetism so help something escape from a black hole past the event horizon? Gravity is weak compared to the other forces, but it seems only electromagnetism would have a chance as the strong nuclear force is for holding atoms together, and weak nuclear force is I believe for radioactive decay. So my question is if you had a super strong magnet could it over power the gravity of a black hole and pull particles out?
  2. jcsd
  3. Nov 30, 2009 #2


    User Avatar
    Science Advisor

    Electromagnetism is propagated by photons, which is light, and by definition light cannot escape the event horizon of a black hole. So, the answer is no.
  4. Nov 30, 2009 #3
    However, virtual particles CAN escape from balck hole (because they are not limited by C)

    For this reason BH can be charged and attract/repel other charges.
  5. Dec 1, 2009 #4


    User Avatar
    Science Advisor
    Gold Member

    See Steven Hawkings treatise on virtual particles at a black hole horizon. They do not violate c. Black holes acquire charge from matter in their accretion zone.
  6. Dec 1, 2009 #5
    Chronos, no.
    What if BH *already* had a charge before it collapsed?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook