What happens if two black holes fall in each other? Do they

>>9150043
My god, that attrocious typesetting. You don't deserve the answer for posting that image.

>>9150043
They merge. The event horizon would expand. To the observer the photon sphere would also expand as light entered a new orbit around the larger event horizon.

>>9150051
You can tell him personally
https://www.uts.edu.au/staff/peter.mclean
[email protected]


>>9150058
That's what I thought, but something seems off...

>>9150147
>but something seems off...
What seems off to you is that most objects that enter a black hole emit or reflect light, which is why we would see it reach the event horizon but not cross over.
A black hole does not. Rather than seeing it cross the event horizon what we would see is the result of it crossing the event horizon, which would be the change in how the black hole it joined affected the light around it.

File: funil.png (44KB, 584x344px) Image search: [Google]

44KB, 584x344px

>>9150214
Thanks, I think I can imagine it now.

I was trying to picture it as two funnels merging, and that isn't easy to imagine...

>>9150240
Well, that's just a 2D representation of space time. It helps us visualize the effects of gravity but it isn't very useful for picturing what is going on in 3D space.

>>9150257
True