The Schwarzschild radius is
A) half the diameter of the singularity in a black hole.
B) the distance to which gas is ejected in a planetary nebula.
C) half the diameter of a neutron star.
D) the distance from the center of a black hole to the point at which the escape velocity becomes equal to the speed of light.

Question

Quizplus · Accepted Answer

The Schwarzschild radius is defined as the distance from the center of a black hole to the point at which the escape velocity becomes equal to the speed of light, beyond which nothing, not even light, can escape the black hole's gravitational pull.

The Schwarzschild Radius Is