All Questions
18
questions
1
vote
0
answers
67
views
Types of singularities
I am confused about the types of singularities. According to my limited knowledge there are two types of singularity. One is space like singularity ( a curvature singularity enclosed within a null ...
- 21
0
votes
2
answers
119
views
Why do we defer to GR when describing black holes rather than rely on QM?
This is a broad question but it's well documented that GR and QM are very well tested in their own domains but they conflict around black holes.
Picture a neutron star slowly accreting matter until it'...
-4
votes
1
answer
151
views
If it's a common myth that a black hole contains a singularity, what does a black hole actually (likely) contain?
It's a common myth (especially in popsci) that a black hole contains a singularity. However, I cannot find an explanation for what we think a black hole actually does contain. The best I've seen is &...
- 127
0
votes
1
answer
151
views
Why do black holes remain? [closed]
When we think about black holes as not containing matter but being regions of warped spacetime, I can't think why they don't revert to being Euclidian space more quickly. This is because I can see how ...
- 740
1
vote
2
answers
156
views
Is it possible the Black Holes to be pure deformations in the fabric of spacetime and not an effect of super-dense matter?
Is there any theory in the literature that supports this hypothesis that BHs in their center do not have a super-dense matter singularity but are pure deformations in the fabric of spacetime itself or ...
- 4,170
2
votes
3
answers
606
views
Spacetime inside the horizon of a black hole
According to Susskind a bit of information crossing the event horizon of a black hole instantaneously encounters the singularity. Also, time appears to gradually slow down for an object approaching ...
- 51
1
vote
1
answer
137
views
A Question About the Surface of a Black Hole Singularity
In Kip Thorne's book, Black Holes and Time Warps, he states that the mass of the core of a star shrinks until quantum gravity takes over. And then discusses that at this distance, the singularity ...
- 2,706
8
votes
2
answers
619
views
A naïve question about spacetime singularities
Very little that I know about general relativity is that there are solutions of its equations with singularities, and these are interpreted as black holes.
Mathematically, the most widespread kind of ...
- 513
11
votes
1
answer
2k
views
Do black holes exist in 1+1 dimensional spacetime?
I'm currently working in 1+1 dimensional spacetime and would like to know if black holes can exist in such a manifold? I think they can because the Schwarzchild metric has the coordinate singularity, ...
- 477
0
votes
0
answers
22
views
Particles falling towards a singularity [duplicate]
This is a revision of my earlier question. Sorry. I'm a beginner here and on a learning curve regarding format.
If the gravity well steepens to infinity at the point of a singularity, then so does ...
1
vote
0
answers
45
views
What happens to the space in a black hole? [closed]
What's the smallest unit of space and is space static? What happens when a black hole passes through space? Does it escape the grips of a black hole? does it pull it with? Is space a inseparable ...
- 197
0
votes
1
answer
116
views
What happens to the space a black hole passes through? [closed]
I want to know what happens to the space a black hole crosses over as our galaxy travels through space.
- 197
4
votes
2
answers
225
views
Could all matter in a black hole be actually only on its surface (Schwarzschild radius)?
Layman here, sorry if I miss something obvious.
Black hole entropy depends linearly on its surface. If all matter in a black hole would actually be located only on its surface (or very near), wouldn'...
- 143
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
-2
votes
1
answer
100
views
If black hole is a "hole", how can its position be pinpointed from every position in universe? [closed]
Ok, this is going to sound lame but, here goes: When we say that a black hole is situated at a distance of 1 light year(let) FROM EARTH, that means it may situated at a distance of 100 light years ...
- 475