Choose the correct statement from the following.
Brewster's angle for a transparent medium is

According to Brewster's law, the tangent of the polarizing angle (Brewster's angle) is equal to the refractive index of the medium.

$\tan \theta_B = \mu$

The refractive index $\mu$ of a transparent medium depends on the wavelength of the incident light according to Cauchy's relation:

$\mu = A + \dfrac{B}{\lambda^2} + \dots$

Since different colours of light have different wavelengths $\lambda$, the refractive index $\mu$ is different for different colours. Consequently, Brewster's angle $\theta_B$ is different for light of different colours.

Answer: different for light of different colours