99. A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its:
(c) very high density
not even light, can escape. It is the result of the
deformation of spacetime caused by a very compact
mass. The simplest black hole has mass but neither
electric charge nor angular momentum. The mass of a
black hole is finite, the reason why a black hole has
infinite density is that it's mass is concentrated into a
space of zero-volume. Thus, it has a very high density.