Recent content by Clauslism

When a particle with reverse angular momentum enters the event horizon, it shrinks the total angular momentum of the BH. But the "moment" it leaves the white hole region it should take its angular momentum again with it, right? So the total angular momentum would again increase (i guess this...

Thanks stevebd1! Does this mean that the accleration reaches infinity even before the singularity? Because Δ= r2 + a2 + Q2 - 2Mr diverges at R±. But then we would be expirence an infinite gravitational field even at the event horizon - i am missing something here, right? (Or is this again just...

But what is obsverable to us in region I if send a particle into the Kerr-BH? - The angular momentum of the BH. And this changes if and only if the particle ends its life in one of the singularties. If would transverse the singularties to one of the new universes, it should not change the...

I don't want to include QG at all in this picture - so many different theories and none of them tells us up to today anything about the interior of the BH. But of course the formal statement would be to say, that everything inside the event horizon can never be observed by us and thus cannot be...

That's interessting: i read about this before, but assumed it must be wrong. I was always thinking, that the regions where gravity becomes repulsive are the regions of negative r (the regions inside the ring singularity). Can you please give me a rough scetch how to see from the metric (or...

That's true, its describing the spacetime as a whole and strictley mathematical spoken we are done. But if you for example take the Penrose Process, you assume that this approximatley describes only a part of our universe and we can come from far away with particles carrying angular momentum (if...

Thank you for your answer! Yeah, i know the idea behind the maximal analytic extension... but r being great than zero is no requirement, isn't it? For the ring singularity you extend also to negative values of r, which is where the regions come into play, which finally would allow closed...

Confirmed! ;) (by a PHD student)

Hey Guys, so i was reading Hawking&Ellis a bit and still encounter always problems with the Penrose-Diagrams. Looking at the Penrose-Diagram for the rotating Kerr-Black hole (just one illustrating picture at the end) i come up the following question: Why are there TWO regions III and III ? In...