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 confusion Not uncommon, is it?

  1. Jun 24, 2005 #1
    I’ll speak in terms of gravity instead of space-time in efforts to keeps this as simple as possible…

    Question: The entropy of a black hole is in direct correlation with the surface area of the event horizon?

    Question: The event horizon is the limit that light has reached before being curved back to the singularity?

    Question: Gravitational strength is directly proportional to the mass of an object?

    Question: How then can light escape further from a singularity if mass is added to the system?

    Question: Wouldn’t the increase in entropy decrease the surface area of a singularity due to the more intensive gravitational force being applied to light?

    I know this is not a very well understood subject but if someone could throw a theory my way I'm all ears...
  2. jcsd
  3. Jun 24, 2005 #2


    User Avatar
    Science Advisor

    I believe so.

    Event horizon is point of no return for anything going in. What goes on inside is conjecture. General relativity and quantum theory are in conflict. Singularity is a guess - predicted by gen. rel., but very questionable by quantum theory.


    Light cannot escape from a black hole. Radiation seen from the outside comes from matter heating up as it falls in.

    I'm not sure of the connection. Surface area of a black hole depends on its mass - specifically, black hole radius is directly proportional to mass.
  4. Jun 24, 2005 #3
    If you think about it the event horizon has to be the furthest light makes it away from the singularity, if it wasn't then it would still be part of our observable universe.

    The questions were somewhat rhetorical, I know the answers to the first ones but it is that last one that I am theorizing about. They were just my thought process in a form of a question.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook