Is it possible to manipulate the size of a black hole or how a black hole behaves if scientists were able to synthesize hawking radiation on demand. That is, if I could find a way to imitate hawking radiation in a missile would this missile decrease the size of the black hole I fire the missile at? I am thinking provided I create enough hawking radiation it should have an effect on the black hole size once the missile detonates. That is if it is true that hawking radiation can make the black hole disappear as it does one the mini black holes who die because of hawking radiation.


1 Answer 1


Hawking radiation isn't some special kind of radiation. It's perfectly ordinary "thermal" radiation, mainly photons, with a few neutrinos and electrons and positrons if the temperature is high enough. Black holes shrink when they emit it, not when the absorb it. So aiming simulated Hawking radiation (or any other kind of radiation) into a black hole just makes it bigger.

  • $\begingroup$ Thanks for the response. Thank God this is not possible. I would have made things worse by making a super massive black hole even larger! SORRY everyone. By the sounds of it everyone dies. $\endgroup$
    – Logikal
    Aug 15, 2019 at 19:52
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    $\begingroup$ @Logikal What do you mean by "made things worse"? You make it sound like black holes are bad. $\endgroup$
    – PM 2Ring
    Aug 15, 2019 at 20:10
  • $\begingroup$ @Logikal Are you playing space D&D or something? :D $\endgroup$
    – SpaceCore
    Aug 15, 2019 at 20:11
  • $\begingroup$ @pm 2ring, I was trying to extend the amount of time of something falling into a black hole such as a planet or a nearby star. If we could control the radiation we could control the size of the black hole to stop feeding. But the answer above would prove I accelerated the feeding of the planet or nearby star. Oops.Enough hawking radiation should eliminate the black hole I thought. I missed the memo about the hole emitting the hawking radiation. I guess that should be my question. If I can force the emission of hawking radiation that should modify its size and feeding. Or is that wrong as well? $\endgroup$
    – Logikal
    Aug 15, 2019 at 20:18
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    $\begingroup$ Forcing emission would shrink the hole, but there is absolutely no way suggested by the theory to change the rate of emission. $\endgroup$ Aug 15, 2019 at 20:20

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