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Feb23-12, 01:29 PM
DaveC426913's Avatar
P: 15,319
Quote Quote by Lapidus View Post
Is it true that massive observers travel with c when passing an event horizion?

I know that light cones get tilted at the event horizon. But every observers travels at light speed there?

thanks in advance
No. No massive object can reach c, even at the event horizon of a BH.

The EH simply means that the escape velocity at that point is c, meaning that that any object (such as a photon) will never achieve escape velocity. It is incidental that any other object moving slower than c cannot escape either.