What is the event horizon of a black hole?
A) The "surface" from the inside of which nothing can escape
B) The "surface" at which all "events" or activity appear to happen because of general relativity
C) The infinitesimally small volume at the center of the black hole that contains all of the black hole's mass
D) The "surface" inside which any object entering will leave with greater energy than that with which it entered

Question

Quizplus · Accepted Answer

The event horizon of a black hole is defined as the boundary beyond which nothing, not even light, can escape its gravitational pull. It acts like a point of no return, rather than a physical surface.

What Is the Event Horizon of a Black Hole