Choose the CORRECT statement from the following. (b)ewster's angle for a transparent medium is
Choose the CORRECT statement from the following.
(b)ewster's angle for a transparent medium is
different for lights of different colours.
different for lights of same colour.
same for lights of different colours.
independent of refractive index of the medium.
Solution
Brewster's angle $\left(\theta_B\right)$ depends on the refractive index ( $n$ ) of the medium, which varies with the wavelength of light. Since different colours of light have different wavelengths, the refractive index and consequently Brewster's angle will be different for each colour.
Formula for Brewster's angle:
$\tan \theta_B=n$
Where $\boldsymbol{n}$ is the refractive index of the medium for the specific wavelength of light. Hence, Brewster's angle changes with the colour of light.