Black hole question

  • Thread starter photon
  • Start date
  • #1
photon
124
0
Why is it said that a black hole is a literally bottemless pit in space-time? If it weren't bottemless, then the singularity inside would not have to be of infinite density.

I'm not sure if I have missed anything important, so PLEASE help!
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
43,021
970
Yes, but a black hole is, by definition, of infinite density.\\


Well, the way you are putting it, that's true. In general, a black hole only has to be massive enough that light cannot escape it. (It's "escape velocity" is greater than the speed of light.)

A large (in volume) black hole would not have to have infinite density and would not be "a literally bottemless pit in space-time".
 
  • #3
bogdan
191
0
What do you mean by "density" ?
Huh ?
mass/volume ?
mass=finite
volume<>0...(the radius of the horizon is not 0...)
so density is not infinite...or am I wrong ?
 
  • #4
meister
56
0
I think he was talking about the singularity's density.
 

Suggested for: Black hole question

Replies
25
Views
329
Replies
6
Views
55
  • Last Post
Replies
1
Views
320
  • Last Post
Replies
2
Views
220
Replies
2
Views
364
  • Last Post
Replies
1
Views
442
  • Last Post
Replies
2
Views
184
Replies
10
Views
559
Replies
15
Views
534
Top