How fast is the escape velocity at the event horizon around a black hole?
A)slower than the speed of light
B)equal to the speed of light
C)much faster than the speed of light
D)the escape velocity depends on the mass of the black hole

Question

Quizplus · Accepted Answer

The escape velocity at the event horizon around a black hole is equal to the speed of light. At this point, the gravitational force is so strong that light cannot escape. This is what makes black holes appear black as they do not emit any visible light.

How Fast Is the Escape Velocity at the Event Horizon