- #1
the one
- 13
- 0
Hi
I have a simple question
in GR we can claculate the gravitational acceleration of the black hole with the Equation :
[tex]
\[
a = \frac{{GM}}{{r^2 \sqrt {1 - \frac{{r_s }}{r}} }}
\]
[/tex]
now , the acceleration of a mass which falls into the black hole at the event horizon (when[tex]
\[
r = r_s
\]
[/tex])
goes to infinity . So the velocity of this mass must be greater than the speed of light.
How ?
I have a simple question
in GR we can claculate the gravitational acceleration of the black hole with the Equation :
[tex]
\[
a = \frac{{GM}}{{r^2 \sqrt {1 - \frac{{r_s }}{r}} }}
\]
[/tex]
now , the acceleration of a mass which falls into the black hole at the event horizon (when[tex]
\[
r = r_s
\]
[/tex])
goes to infinity . So the velocity of this mass must be greater than the speed of light.
How ?