Black hole paradox, gravity waves

  • #1
9
0

Main Question or Discussion Point

well since gravity waves are supposed to have mass, they are supposed to be effected by gravity itself, and :/ how are we supposed to detect gravitational waves emitted from a black hole when none can get out?
 

Answers and Replies

  • #2
PeterDonis
Mentor
Insights Author
2019 Award
28,327
8,083
gravity waves are supposed to have mass
No, they don't. They carry energy, but they have zero stress-energy.

they are supposed to be effected by gravity itself
In the sense that they follow the geometry of spacetime, yes.

how are we supposed to detect gravitational waves emitted from a black hole when none can get out?
The gravitational waves detected by LIGO were not emitted from inside black holes. They were emitted from outside the horizons of merging black holes.
 
  • #3
9
0
No, they don't. They carry energy, but they have zero stress-energy.



In the sense that they follow the geometry of spacetime, yes.



The gravitational waves detected by LIGO were not emitted from inside black holes. They were emitted from outside the horizons of merging black holes.
thank's that clears thing up. but , don't gravity waves move slower than the speed of light? 0_o still no mass?
 
  • #4
PeterDonis
Mentor
Insights Author
2019 Award
28,327
8,083
don't gravity waves move slower than the speed of light?
No. They are massless and move at the speed of light.
 

Related Threads on Black hole paradox, gravity waves

  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
12
Views
804
  • Last Post
2
Replies
31
Views
4K
  • Last Post
2
Replies
45
Views
3K
  • Last Post
2
Replies
44
Views
5K
Replies
19
Views
4K
Replies
7
Views
1K
Replies
3
Views
2K
Top