- #1
Gerinski
- 323
- 15
Hi,
I have often read that at large enough distances, the gravitational effect of a black hole is no different than the gravitational effect of a star or other body of the same mass.
But that at close distances the difference shows up, for example the notion of the photon sphere at 1.5 times the Schwartschild radius which does not appear for non-black-hole objects.
At which distance precisely do the gravitational effects of black holes become undistinguishable from the effects of a non-black-hole object of the same mass, and why?
TX !
I have often read that at large enough distances, the gravitational effect of a black hole is no different than the gravitational effect of a star or other body of the same mass.
But that at close distances the difference shows up, for example the notion of the photon sphere at 1.5 times the Schwartschild radius which does not appear for non-black-hole objects.
At which distance precisely do the gravitational effects of black holes become undistinguishable from the effects of a non-black-hole object of the same mass, and why?
TX !