Question

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

Answer 1

According to Rayleigh, th intensity T of scattered light is found to be inversely proportional to the fourth power of wavelength '$\lambda$' of light, i.e.

$I\propto \frac{1}{{\lambda }^4}$

Thus, light of smaller wavelength is scattered least. Here,

$\lambda {}_{\text{blue}}<\lambda {}_{\text{green}}<\lambda {}_{\text{yellow}}<\lambda {}_{\text{red}}$

Since the wavelenghth of blue light is the least, it is scattered the most,
Hence option (d) is correct.