An unpolarized light beam travelling in air is incident on a medium of refractive index $1.73$ at Brewster's angle. Then-
Answer: (A) reflected light is completely polarized and the angle of reflection is close to $60°$
Concept. Brewster's law $\tan i_B = n$; at $i_B$ the reflected light is completely polarised and the transmitted light only partially.
Step 1. Brewster angle. $\tan i_B = 1.73 \approx \sqrt3 \Rightarrow i_B = 60°$; the angle of reflection is $60°$.
Step 2. Check the options. Reflected: completely polarised. Transmitted (refraction $30°$): only partially polarised. So statement (1) is correct.
Answer. Reflected light is completely polarized and the angle of reflection is close to $60°$ (Option A).
Solution by Sreeraj P, M.Sc Physics