blike Posted March 23, 2003 Share Posted March 23, 2003 I just found out about this from the recent news article about black holes. Is this something that is hypothesized or is it considered a pretty solid notion? I thought photons could not escape black holes. If this were true, how could photons exert enough pressure in the opposite direction to keep matter from falling in? Link to comment Share on other sites More sharing options...
greg1917 Posted March 23, 2003 Share Posted March 23, 2003 Id say it was a solid notion because surely thats essentially what a black hole is , something from which photons cannot escape? im not saying thats the definition of a black hole but i was under the impression that was a fundemental part of the theory Link to comment Share on other sites More sharing options...
blike Posted March 23, 2003 Author Share Posted March 23, 2003 Id say it was a solid notion because surely thats essentially what a black hole is , something from which photons cannot escape? But if photons could not escape, how can they exert pressure in the opposite direction to keep matter from falling in? Link to comment Share on other sites More sharing options...
fafalone Posted March 23, 2003 Share Posted March 23, 2003 Matter does fall into a black hole. Link to comment Share on other sites More sharing options...
blike Posted March 23, 2003 Author Share Posted March 23, 2003 Originally posted by fafalone Matter does fall into a black hole. But at the "Eddington Limit", the luminosity is so great that the photons exert enough pressure to keep matter from falling in any faster. Link to comment Share on other sites More sharing options...
blike Posted March 23, 2003 Author Share Posted March 23, 2003 I'm assuming by looking at what I attached that electrons transfer their momentum to photons? Link to comment Share on other sites More sharing options...
superchump Posted April 28, 2003 Share Posted April 28, 2003 I'm assuming this takes place before the event horizon. It's an equalibrium between the gravitational gradiant and the radiation squeezed out of matter trapped in the accretion disk. Link to comment Share on other sites More sharing options...
Raider Posted April 28, 2003 Share Posted April 28, 2003 Black holes don't hold *everything* within the event horizon or even the singularity for that matter. Uncertainity principle allows for stuff to escape and thus push other things back. Link to comment Share on other sites More sharing options...
Radical Edward Posted April 29, 2003 Share Posted April 29, 2003 be careful when mentioning the uncertainty principle and black holes. As I have said before, General Relativity and Quantum mechanics do not mix, one, or both of them, needs some correction. Link to comment Share on other sites More sharing options...
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