Home PYQs UPPSC UPPSC MCQs Prelims 2005 (GS Paper I)

Question

Which one of the following statements is not true about cosmic rays?

  1. They are electromagnetic waves
  2. They have very short wavelength
  3. They are made of highly energetic charged particles
  4. They originate from the Sun

Answer:

Option A: They are electromagnetic waves

Detailed Solution:

The correct answer is “They are electromagnetic waves”.

Cosmic rays are high-energy particles that travel at nearly the speed of light and are made up of atom fragments, mostly atomic nuclei.

They are not part of the electromagnetic spectrum, which includes gamma rays, X-rays, ultraviolet rays, visible light, infrared, microwaves, and radio waves.