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  • Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset? (a) Dispersion of light (b) Scattering of light (c) Total internal reflection of light (d) Reflection of light from the earth

Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
(a) Dispersion of light
(b) Scattering of light
(c) Total internal reflection of light
(d) Reflection of light from the earth

Answers (1)

Ans. (b)
Amount of scattering is inversely proportional to fourth power of wavelength.
Wavelength of red colour is the largest so red colour is scattered the least by smoke or fog.
The reddish appearance of the sun at sunrise or sunset is due to least scattering of red light.
Therefore option (b) is correct

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