Ray Optics and Optical Instruments - Result Question 15

15. The reddish appearance of the sun at sunrise and sunset is due to

[2000]

(a) the colour of the sky

(b) the scattering of light

(c) the polarisation of light

(d) the colour of the sun

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Answer:

Correct Answer: 15. (b)

Solution:

  1. (b) It is due to scattering of light.

Scattering $\propto \frac{1}{\lambda^{4}}$. Hence the light reaches us is rich in red.