Welcome, Guest. Please login or register.

Login with username, password and session length

Metaphor for death

Metaphor for death
January 24, 2014, 09:47:01 AM
Hawking proposes a third, tantalizingly simple, option. Quantum mechanics and general relativity remain intact, but black holes simply do not have an event horizon to catch fire. The key to his claim is that quantum effects around the black hole cause space-time to fluctuate too wildly for a sharp boundary surface to exist.

In place of the event horizon, Hawking invokes an “apparent horizon”, a surface along which light rays attempting to rush away from the black hole’s core will be suspended. In general relativity, for an unchanging black hole, these two horizons are identical, because light trying to escape from inside a black hole can reach only as far as the event horizon and will be held there, as though stuck on a treadmill. However, the two horizons can, in principle, be distinguished. If more matter gets swallowed by the black hole, its event horizon will swell and grow larger than the apparent horizon.


Re: Metaphor for death
January 25, 2014, 08:47:03 AM
Metaphor for undeath: Stephen Hawking

Re: Metaphor for death
January 27, 2014, 11:03:03 AM
I have to question the validity of any pronouncement made by someone who lives only in a theoretical reality.