UPSC Prelims PYQ 2000: Why a black hole does not allow radiation...
A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its
- very small size
- very large size
- very high density
- very low density
Explanation
Option (c) is correct
- A Black hole has extremely high density and gravitational pull, so strong that even light or any other radiation cannot escape once it crosses the event horizon. This immense gravity results from a very large amount of mass being compressed into a very small volume.
Answer: (c) very high density
