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.
Explanation : Intensity of scattered light, I ∝ 1/λ4. Since the wavelength of red light is greater than the wavelengths of all other lights, therefore, red
colour is scattered least and confined around the sun.