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Thread: Hawking radiation?

  1. #1 Hawking radiation? 
    DGX is offline
    New Member
    Join Date
    Aug 2007
    I have been reading about Hawking radiation but to me it doesnt make sense. So maybe someone can show me where i am going wrong...

    In my understanding, Hawking radiation is the illusion that black holes are emitting radiation. This is because by the event horrizon no electromagnetic radiation can escape the gravity of the black hole. This leaves a part of space where there is no electromagnetic field. This controdicts the Uncertaincy Principle as you know the size and strength of the field that is there ( as bother are zero), leading to zero-point fuluctuations.

    These Zero piont fluctuations can be described as a partical and a anti-particle spontaneously appearing then eliminating each other. However as these particals are close to a black hole, occasionly an antiparticle is pulled beyond the event horrizon and elimantes some of the mass of the black hole; leaving the particle to escape the black hole. This gives the illusion as the black hole is getting smaller and there are particles radiating from it.

    However,(and this is what i don't understand) why is it only the antiparticle that is pulled into the blackhole? Surely the same amount of particles and antiparticles should pass beyond the event horrizon. In which case the black hole would maintain a constant mass. Also it would radiate the same amount of particles and antiparticles, which would cancle each other out mean that there would be no radiation emmitions.

    I would be grateful if someone could correct me on this or direct me to a website which can. Thank you.


    P.S - sorry about the poor spelling :?

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  3. #2  
    Forum Ph.D.
    Join Date
    Nov 2005
    Columbus, OH
    I'm just going by the little that I do know but it's my understanding that the black hole is the source of the energy required for these particles to spring into being. So while one particle falls into the black hole, the other particles escapes and so the black hole as lost that 1 particles worth of energy/mass. The black hole has 2 particles borrowed but just 1 returned.

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  4. #3  
    Time Lord
    Join Date
    Mar 2007
    I'm just going to venture a guess for fun. :P

    Maybe the force of acceleration increases the mass of the antiparticle, as predicted by relativity?

    This happens to positive particles too, but whereas the positive particle loses this mass when it hits the center of the black hole and is decelerated by the impact..... the antiparticle doesn't get decelerated before it interacts with the positive particles?

    Of course, it's totally, just a guess because I'm bored....
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