[–] Krael 0 points 1 point 1 point (+1|-0) ago (edited ago)
I'm gonna need some actual math to back up that claim. The matter within the black hole is what generates its gravity, so if all the mass converts into energy via annihilation, there's no longer anything holding that energy there. I'm not a scientist by any stretch of the imagination, but the flippant "this is the way it is" without providing any evidence to support that claim doesn't resonate with me.
[–] invariantMass ago
Matter-antimatter annihilations result in massive amounts of energy. So all of that matter that was being held in a location gravitationally would be conserved in the resultant annihilation energy and would be emitted in the form of mostly high energy photons (however other particle emissions are not forbidden). In fact, the amount of gravitational energy due to a massive matter/antimatter object is quite negligible compared to the mass to energy conversion of the annihilation. So he's not entirely wrong, besides the antimatter black hole, which is non existent and pure energy, which is kind of a misnomer.
[–] chmod 0 points 2 points 2 points (+2|-0) ago (edited ago)
Black holes are points of infinite (or close to it) gravity. There's no such thing as an antimatter black hole.
For discussion sake let's assume there's a black hole that has sucked in nothing but antimatter. When it runs into a black hole that has sucked in normal matter they would simply merge and join masses. If there was any interaction between the matter and antimatter within the black hole we'd never see it because it could not leave the event horizon.
[–] 3800087? ago
Without the math, this cannot be taken seriously. A black hole forms because a larger star loses its ability to create enough energy from the material within it to remain expanded, in balance against the gravity of that same material. Is there math that says introducing enough energy at once to overwhelm a black hole's gravity wouldn't work the same way? For example, what would happen if two small black holes of similar mass collided at near the speed of light? Would they have enough gravity to overcome their impact?