What separates a black hole from the rest of our universe?
A) Its event horizon
B) The surface of its ergosphere
C) A crystalline crust
D) A singularity

Question

Quizplus · Accepted Answer

The event horizon is the boundary around a black hole beyond which nothing, not even light, can escape. This is what separates a black hole from the rest of the universe. The surface of the ergosphere is also a boundary around the black hole, but it does not have the same significance as the event horizon. A crystalline crust and singularity are not features that distinguish a black hole from the rest of the universe.

What Separates a Black Hole from the Rest of Our