All Questions
7
questions
3
votes
2
answers
297
views
Time in the negative mass Schwarzschild solution
I have read that for the Schwarzschild metric solution with $M<0$, something odd happens with the time coordinate. For the constants of motion, $dt/d\tau=e(1 - 2GM/r)^{-1}$ with $M<0$ and $e$ a ...
- 476
1
vote
1
answer
85
views
How to describe ‘when’ a black hole actually is? [closed]
If I look at any point in space I can think of it as being in the future because it takes me time to travel there. I can go there and an observer can watch me go there.
When I look at a black hole I ...
- 740
1
vote
1
answer
259
views
What is the equation for gravitational time dilation? [closed]
I have been studying relativity for a while now, but I am still unsure what the equation is to determine a gravitational time dilation. I am more than aware of the speed time dilation equation, but I ...
- 11
1
vote
1
answer
500
views
Why does the flow of time slow down as the space-time curvature gets deeper?
According to General Relativity and its experimental tests, a clock far above Earth ticks faster than it does on the surface of Earth. Because near the surface of the Earth space-time curvature is ...
- 23
1
vote
0
answers
126
views
Free falling into a black hole: time to the singularity doubt!
I have trying to get a more precise insight into the calculation of the time to the singularity of a test mass into a non-rotatic uncharged black hole.
Prelude: the lagrangian for a massive particle ...
- 6,611
7
votes
3
answers
7k
views
Time Reversal in a Black Hole
I had a lively discussion with a person about black holes recently, and was making the point about gravitational acceleration in GR being paralleled by speed in SR. One thing that I know people talk ...
- 453
3
votes
4
answers
2k
views
Time inside a Black hole
If time stops inside a black hole, due to gravitational time dilation, how can it's life end after a very long time? If time doesn't pass inside a black hole, then an event to occur inside a black ...
- 558