All Questions
5
questions
17
votes
2
answers
5k
views
Space falling faster than light after it falls inside the event horizon of a black hole?
Typing my question directly so people know what I am asking, afterwards providing background and context.
Q: What does it mean when space is falling, faster than light?
(I am specifically wondering ...
- 398
0
votes
1
answer
192
views
Does spacetime interval at event horizon become light-like for all trajectories?
I have been reading up few papers against the black hole paradigm specifically ECO, and i came across the argument raised by them that at r = 2GM, ds does indeed vanish. Is it correct? Please provide ...
- 134
2
votes
3
answers
6k
views
Black Holes 2D or 3D?
Are black holes 2 dimensional or 3 Dimensional. If they were 3 Dimensional it would make more sense that wherever you approach it the gravity would be the same. But images on the internet show it as a ...
- 305
1
vote
0
answers
28
views
Can one observe a blackhole grow from outside its event horizon? [duplicate]
For an observer outside Black hole's event horizon nothing ever falls into the black hole .
So if the observer waits for an eternity outside a super massive blackhole feeding on gas , will the ...
- 838
3
votes
0
answers
359
views
Why is surface gravity named this way?
I've come across two definitions of surface gravity.
We look at the killing horizon of a Killing vector field $\xi$ and we find from the definition that $\xi_\nu \nabla^\nu \xi^\mu = \kappa \xi^\mu$....
- 2,849