Thursday, August 11, 2011

Hawking paradox?

It's often noted that nothing can escape from beyond a black hole's event horizon. One thing that is often overlooked, though, is that the prohibition about crossing the horizon goes both ways; Nothing can ever fall beyond the horizon too (at least in the frame of a remote observer). You'd have to fall forever to reach the horizon due to the singular distortion of space-time. In fact, the forever in-falling matter evaporates after 10 to the big years (again, external frame) and becomes Hawking radiation. Apparently, according to Hawking recent calcs, this radiation, in principle, preserves and returns the information to the outside universe.

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