From: Zardoz ®	04/11/2001 19:34:58
Subject: re: COSMOLOGY FAQ	post id: 484065
If light always travels at a constant speed, and it's the distance that changes, and light can't escape a black hole, inside the event horizon of a black hole must have an infinite size From: James R (Avatar) The answer depends partially on your point of view. Imagine we drop a stone into a black hole, while sitting a safe distance from the event horizon. As we watch the stone falling towards the hole, it seems to fall slower and slower, whilst the light coming from the stone is shifted more and more to the red end of the spectrum. We never see the stone hit the event horizon, let alone fall into the hole. Now imagine riding on the stone as it falls. You would fall to the singularity at the centre of the hole in a finite amount of time as measured on your watch. You would not be aware of passing the event horizon (unless you tried to turn around and go back out). Once anything is inside the event horizon of a black hole, all paths forward in time lead inevitably to the singularity. This applies for light as for anything else - once light passes inside the event horizon it cannot escape the hole since it must inevitably hit the singularity.