Home PYQs UPPSC UPPSC MCQs Prelims 2015 (GS Paper I)

Question

Blue colour of the sky is due to:

  1. Scattering of light
  2. Dispersion of light
  3. Interference of light
  4. Emission of more blue light as compared to other colours by the sun

Answer:

Option A: Scattering of light

Detailed Solution:

The correct answer is “Scattering of light”.

The scattering of sunlight by atmospheric particles, like molecules and small particles, is responsible for the blue appearance of the sky. This phenomenon is known as Rayleigh scattering.