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Q.

In the question given below, there are two statements marked as Assertion (A) and Reason (R). Read the statements given below carefully:

Assertion (A): The Sun at the sunrise or the sunset appears red whereas at noon, the Sun appears white.

Reason (R): Light from the Sun near the horizon passes through larger distance in the earth’s atmosphere than the light from the Sun overhead.

Choose the correct answer using the codes given below:
Explanation:

ANSWER: (A)

  • Light from the Sun near the horizon passes through thicker layers of air and larger distance in the earth’s atmosphere before reaching our eyes. However, light from the Sun overhead would travel relatively shorter distance. 
  • At noon, the Sun appears white as only a little of the blue and violet colours are scattered. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles. 
  • Therefore, the light that reaches our eyes is of longer wavelengths. This gives rise to the reddish appearance of the Sun.

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