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Question

Blue colour of sky is due to :
  1. dispersion of light
  2. refraction of light
  3. scattering of light
  4. reflection of light

A
scattering of light
B
refraction of light
C
dispersion of light
D
reflection of light
Solution
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A day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

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