A black hole is so named because
A) the gravitational field is so high that the wavelength of its emitted light is gravitationally redshifted to radio wavelengths.
B) it emits no visible light because it is so cold, less than 100 K.
C) no light can escape from it due to its powerful gravitational field.
D) it is colder than the rest of the universe; that is, its effective temperature is less than 3 K.

Question

Quizplus · Accepted Answer

Black holes are named for their characteristic of not allowing any light to escape once it passes the event horizon, due to their extremely strong gravitational fields. This means they do not emit any light, making them "black."

A Black Hole Is So Named Because