3 ms·
I'm curious--if the ball rolling down an incline were instead a photon falling through an event horizon, would the time-reversal involve breaking various physic
by evo 15y ago
I'm curious--if the ball rolling down an incline were instead a photon falling through an event horizon, would the time-reversal involve breaking various physical laws? (Does it fall into the "physics doesn't apply inside of a black hole" disclaimer?)
- sp332 15y agoTime "slows down" asymptotically as you approach the event horizon, so you will never "see" anything cross it. https://secure.wikimedia.org/wikipedia/en/wiki/Event_horizon#Interacting_with_an_event_horizon https://secure.wikimedia.org/wikipedia/en/wiki/Event_horizon...
- kmm 15y agoNo, the physics are still valid in the event horizon. It's just the singularity at the exact centre of the black hole that is problematic. Interestingly, if we ignore only the point at centre, it can be shown that an object that falls in a black hole, goes right through it and is ejected at the other side. All in finite proper time. This situation is non-physical because it takes an infinite amount of time for the photon to reach the event horizon. Even if we could reverse the photon inside the black hole, it would still take an infinite amount of time to crawl back out. So even in theory, black holes are still inescapable.