Classical Black holes didn't seem that strange, but when general relativity and quantum mechanics are introduced they become stranger, as exemplified by Hawking Radiation. All this leads to 3 paradoxes: 1. time appears to stop at the event horizon, 2. Black Hole evaporation appear to violate a central tenet of quantum mechanics, 3. If black holes radiate at some finite temperature, then something very strange must be happening near the event horizon, which is inconsistent with the fact that a classical observer notices nothing strange when they fall through. I try and show how all this arises in a 15 min #15minphysics episode.
28 апр 2020