Q. An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then-
A) reflected light is completely polarized and the angle of reflection is close to $60^\circ$
B) reflected light is partially polarized and the angle of reflection is close to $30^\circ$.
C) both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to $60^\circ$ and $30^\circ$, respectively.
D) transmitted light is completely polarized with angle of refraction close to $30^\circ$
Explanation
[Solution by Claude - not from source] $\tan\theta_B=1.73\Rightarrow\theta_B=60^\circ$, refraction angle $=30^\circ$. At Brewster's angle the reflected light is completely polarized; the transmitted light is only partially polarized. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.