2 ms·
> gravity propagates at the speed of light... And light is not fast enough to escape the black hole. Gravity doesn't have to get out of the hole. The gravity y
by pdonis 3y ago
> gravity propagates at the speed of light... And light is not fast enough to escape the black hole.
Gravity doesn't have to get out of the hole. The gravity you feel outside a black hole is due to the global spacetime geometry, not to any "force" coming out of the hole. If you want to attribute it ultimately to the presence of matter, it is the matter in your past light cone, which originally collapsed to form the hole, before it fell below the event horizon.
See this Usenet Physics FAQ article:
https://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_gravity.html https://math.ucr.edu/home/baez/physics/Relativity/BlackHoles...
- pixl97 3y agoYa if gravity had to get out of the hole the if a black hole happened in that universe it would just snap shut and kind of disappear.