- #1
Matt204823545
- 18
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- TL;DR Summary
- Many things about a black hole seem contradictory
It takes infinite amount of time to cross the event horizon from an outsider's perspective. But black holes eventually decay from Hawking radiation. So if you wait long enough a black hole won't exist anymore, as it would have decayed into nothing.
The in-falling observer witnesses infinite years pass outside as they fall into the black hole. Therefore they should witness the decaying of every black hole in the universe, including the one they're falling into. So, eventually they should stop falling and find themselves in a cold, dark, empty universe, because the black hole will have ceased to exist long before they even reached the event horizon.
Or does their black hole still exist because it's downstream of space-time and so it hasn't had time to decay yet in the observer's perspective?
If the singularity were a ring and the observer could fly through it to the other side, would they then witness only a single black hole (the one they emerged from) in the universe, or will it decay away into nothing as they passed through the ring? Because it seems incorrect to have only 1 black hole in existence, but it also seems incorrect for it to decay because the observer didn't get near enough to the ring to witness it decaying. What really happens here?
The in-falling observer witnesses infinite years pass outside as they fall into the black hole. Therefore they should witness the decaying of every black hole in the universe, including the one they're falling into. So, eventually they should stop falling and find themselves in a cold, dark, empty universe, because the black hole will have ceased to exist long before they even reached the event horizon.
Or does their black hole still exist because it's downstream of space-time and so it hasn't had time to decay yet in the observer's perspective?
If the singularity were a ring and the observer could fly through it to the other side, would they then witness only a single black hole (the one they emerged from) in the universe, or will it decay away into nothing as they passed through the ring? Because it seems incorrect to have only 1 black hole in existence, but it also seems incorrect for it to decay because the observer didn't get near enough to the ring to witness it decaying. What really happens here?
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