4 ms·
An "antimatter black hole" is just a black hole. There might still be something behind the event horizon to annihilate with, there might not, the question might
by nyssos 3y ago
An "antimatter black hole" is just a black hole. There might still be something behind the event horizon to annihilate with, there might not, the question might be meaningless, but in any case you're not getting anything back out again.
- User23 3y agoDon’t have to get anything out just need to accelerate the singularity.
- ben_w 3y agoIt doesn't, at least not within currently understood physics: https://www.youtube.com/watch?v=cFslUSyfZPc https://www.youtube.com/watch?v=cFslUSyfZPc You'll push the black hole with precisely the same momentum (in the opposite direction) as you yourself got from whatever device was pushing the matter towards the black hole.
- User23 3y agoWhat happens when an antimatter black hole collides with an equal mass matter black hole? Does the total mass convert to energy? If so what happens to the gravitational effects?
- nyssos 3y agoNo, an antimatter black hole is literally just a black hole. They're the same thing. > Does the total mass convert to energy? If so what happens to the gravitational effects? Energy density and mass density are the same thing too. A kilogram of hydrogen next to a kilogram of antihydrogen gravitates in exactly the same way as ~10^17 joules of equivalently distributed photons. The only difference is that the photons won't stay equivalently distributed for long.
- User23 3y agoI asked my particle physicist buddy about this and he pointed me here[1]. It sounds like you're giving the "classical" answer, but it's an area of open discussion. He thinks it could conceivably emit energy as gravitational waves. [1] https://physics.stackexchange.com/questions/7290/no-hair-theorem-for-black-holes-and-the-baryon-number https://physics.stackexchange.com/questions/7290/no-hair-the...
- nyssos 3y agoThe no-hair theorem very likely goes through semiclassically as well, at least where global symmetries like baryon number are concerned, but yes, ultimately no one knows for sure what the story is for the undiscovered true theory of quantum gravity.