In the white light of Sun, maximum scattering by the air molecules present in the earth’s atmosphere is for —

1. red colour
2. yellow colour
3. green colour
4. blue colour

blue colour

Reason — Intensity of scattered light is found to be inversely proportional to the fourth power of the wavelength of light.

(i.e., I ∝ $\dfrac{1}{λ^4}$ ).

As blue light has lowest wavelength, hence, the blue light is scattered the most.