Would a kugelblitz black hole travel at the speed of light? Would it slow down after swallowing more mass?


1 Answer 1


For the photons to interact to create a kugelblitz black hole, they would have to be traveling in different directions, and the resultant average velocity would be less than $c$ in any one direction.

  • $\begingroup$ 1. Does this limitation come from plancks temperature? If yes, then is this a hard limitation or do we simply enter a grey area of physis because we don't understand quantum gravitation? $\endgroup$ Dec 22, 2016 at 15:14
  • $\begingroup$ 2. If the limitation comes from plancks temperature, there is no way to have 3 or more photons in a point to have velocity c. Ie., 3 photons with same frequency/energy, and directions (1,0,0),(0,1,0),(0,-1,0) would have a velocity of 1/3 c in direction (1,0,0), after forming a black hole. This is true for all possible combinations. This is what your conclusion is based on right? If so then I understand it, thanks for the answer. $\endgroup$ Dec 22, 2016 at 15:24

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