What is the significance of the Schwarzschild radius around a black hole?
A) It is the radius at which an orbiting object would show a precession.
B) It is the radius at which gravitational redshift can be detected.
C) It is the radius at which the black hole's spin equals the speed of light.
D) It is the radius at which the escape velocity equals the speed of light.
E) It is the radius at which a body falling onto the black hole would move at half the speed of light.

Question

Quizplus · Accepted Answer

The Schwarzschild radius is the distance from the center of a black hole at which the escape velocity equals the speed of light, marking the event horizon.

What Is the Significance of the Schwarzschild Radius Around a Black