Originally Posted By: Bill S.
There was an exchange earlier about rotating BHs losing energy and slowing down. I can see that, but as they lose energy they become smaller, so would their angular momentum not be conserved by an increase in rotational speed?

Bingo again but I think it's that time stopped thing that is causing him to not see the issue.

We usually discuss it in reverse that the faster a black hole spins then the smaller is its event horizon but you have nailed it that the formula's go both ways.

You are really good at this now Bill S and see you didn't need a single equation to work it out just a few first principles. I tried to get him to work it out himself but he is closed minded, that time thing is really throwing him a loop.

I could say it reminded me of someone else with a reference on a photon smile

Edited by Orac (08/27/15 06:31 PM)
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.