Question

A black hole can be thought of as

A) a star with a temperature of 0 K, emitting no light.
B) the point at the center of every star that provides the star's energy by gravitational collapse.
C) densely packed matter inside a small but finite volume.
D) a region with such a large mass density that even electromagnetic radiation cannot escape.

Answer 1

A black hole is a region with such a large mass density that even electromagnetic radiation cannot escape. It has a singularity at its center and an event horizon, where nothing can escape from the black hole.

Step-by-step explanation:

A black hole can be thought of as a region with such a large mass density that even electromagnetic radiation cannot escape. At the center of a black hole is a singularity, which is a point of infinite density and zero volume. The surface surrounding a black hole, where the escape velocity equals the speed of light, is called the event horizon. Nothing, not even light, can escape through the event horizon from the black hole.