Originally Posted By: Bill S.
https://en.wikipedia.org/wiki/White_hole

Interesting link. In a multiverse scenario, could a white hole simply be the "other side" of a BH, in another universe? Entropy would then be conserved in the multiverse, if not in individual universes.

It's in the article Hawkings actually argued pretty much that

Quote:
This may imply that black holes and white holes are the same object. The Hawking radiation from an ordinary black hole is then identified with the white-hole emission.

His basis is exactly yours and you are now really showing you have pretty much understood it all.

That really was an extension exercise and I am so impressed you got it and made the connection.

See it really isn't that hard smile

Last edited by Orac; 08/23/15 04:41 AM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.