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Comments on Profile Post by magic9mushroom

  1. Imabot
    Imabot
    Maybe he mistaken it with Hawkins radiation?
    Nov 12, 2016
    AngelicKnight. likes this.
  2. Skelion21
    Skelion21
    I think he was trying to make a joke about the coffee being as dark as a black hole.
    Nov 12, 2016
    AngelicKnight. likes this.
  3. Finagle007
    Nov 12, 2016
    AngelicKnight. and Imabot like this.
  4. magic9mushroom
    magic9mushroom
    The comic got it wrong. Black holes don't emit Cherenkov radiation. Cherenkov radiation is emitted when particles' speed relative to a medium exceeds the speed of light in that medium; it's the electromagnetic equivalent of a sonic boom.
    Nov 13, 2016
    AngelicKnight. and Finagle007 like this.
  5. magic9mushroom
    magic9mushroom
    Black holes have a photon sphere (a shell of light trapped in orbit around the black hole) and emit the very faint Hawking radiation, but as their gravitation is equal-opportunity and they're usually found in space they don't generally cause the sort of enormous velocity differential required to create Cherenkov radiation.
    Nov 13, 2016
    AngelicKnight. and Finagle007 like this.
  6. Finagle007
    Finagle007
    I'm very well aware. I've read Hawking's A Brief History of Time several times, among other lit. re: black holes.
    Nov 13, 2016
    AngelicKnight. likes this.