What do we mean by the event horizon of a black hole?
A)It is the center of the black hole.
B)It is the "bottomless pit" of the black hole.
C)It is the place where time begins to slow down as you approach a black hole.
D)It is the boundary within which events in the black hole cannot influence events in the outside universe.

Question

Quizplus · Accepted Answer

The event horizon is the boundary (not the center) of a black hole beyond which events cannot be observed or influenced by the outside universe. It is often referred to as the "point of no return" as anything that crosses it is assumed to be inevitably pulled toward the singularity at the center of the black hole. Time dilation does occur near the event horizon, but it is not the defining characteristic of the event horizon.

What Do We Mean by the Event Horizon of a Black