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Reversal of a black hole ?

  1. May 22, 2008 #1
    Nature prefers symmetry so there must exist which is opposite of a black hole & emits the energy , like being connected to a black hole in opposite direction emitting everything that gets sucked in by a black hole ( like a two cones attached together at apex) , is there an evidence of such a thing ?
     
  2. jcsd
  3. May 22, 2008 #2
    i think the physical matter of this universe is the opposite of a black hole. black holes are actually the absence of matter. the gravitational force of a black hole is so strong, it collapses the atoms structure. but then again, its all theory, we have never even seen a black hole. i think its because these sensors we call eyes can't read the massive amount of energy a black hole emits. our eyes only sense a small wavelength scale. i'm thinking once we are more evolved we might be able to actually see more, or maybe it won't even be seeing. maybe it'll be beyond sensing light. maybe we'll be able to sense gravity, or some other force/energy we can't even comprehend yet
     
    Last edited: May 22, 2008
  4. May 22, 2008 #3

    ZapperZ

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    Your starting premise here is not accurate. Where does it say that "nature prefers symmetry"? I could point a crystal lattice and shows you that the translational symmetry is immediately broken there. Superconductivity has a broken time-reversal symmetry. Kaon decays have CP-violating events, etc... etc. In fact all of the interesting processes have some form of broken symmetry.

    Zz.
     
  5. May 23, 2008 #4

    cristo

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    The time reversal of a black hole is a white hole. However, to the best of my knowledge, these are purely mathematical 'objects'.
     
  6. May 26, 2008 #5
    "Nature prefers symmetry" Not entirely.

    Take a look at time. Time goes forwards, not backwards. Imagine symmetry in time :uhh:
     
  7. May 26, 2008 #6

    Nabeshin

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    You need to be very careful here. For one, black holes are black with the exception of hawking radiation. They do not emit "massive amounts of energy" aside from x-rays produced by infalling matter. That said, just because our human eyes cannot see something does not in any way mean that it is less likely to exist. Black holes exist, and almost every physicist will agree with that. They may have been theoretical constructs back in the 1930s, but now there is tons of evidence (Cygnus X-1?) to support their existence. Because we get the readouts in terms of x-rays and not visible light means nothing. After all, no serious astronomy is done by people with there eyes up to the eyepiece anymore. Everything is electronic.
     
  8. May 27, 2008 #7
    A black hole is NOT the absence of matter. A black hole is so massive that the gravitational strength behind it is so strong nothing can escape it, not even light. Black holes have a massive amount of matter compacted into a relatively tiny space. A recently discovered black hole was only 15 square miles but had the mass 4 times that of our sun. And yes you are right; we have never directly seen a black hole. We can’t directly see them because light can not escape them. We can however see how the black hole affects light around it. The black hole bends light around it and we can see this to know where one is. This is called gravitational lensing.
     
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