UPSC Prelims 2000·GS1·science-and-technology·science and technology

A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its

Dalvoy logo
Reviewed by Dalvoy
UPSC Civil Services preparation
Last updated 23 May 2026, 3:31 pm IST
  1. Avery small size
  2. Bvery large size
  3. Cvery high densityCorrect
  4. Dvery low density

Explanation

The correct answer is C because a black hole is formed when a massive amount of matter is compressed into an extremely small volume, resulting in very high density. This extreme density creates an incredibly strong gravitational field. According to the laws of physics, the gravitational pull becomes so intense that the escape velocity required to leave the black hole exceeds the speed of light. Consequently, nothing, including light and other forms of electromagnetic radiation, can escape from it. While the physical size of the singularity is small, it is the density and the resulting gravity that prevent radiation from coming out.
science-and-technology: A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its

Related questions

More UPSC Prelims practice from the same subject and topic.