Q. Figure represents a glass plate placed vertically on a horizontal table with a beam of unpolarised light falling on its surface at the polarizing angle of $57{^\circ}$ with the normal. The electric vector in the reflected light on screen $S$ will vibrate with respect to the plane of incidence in a
A) Vertical plane
B) Horizontal plane
C) Plane making an angle of $45{^\circ}$ with the vertical
D) Plane making an angle of $57{^\circ}$ with the horizontal
Explanation
(a) When unpolarised light is made incident at polarizing angle, the reflected light is plane polarized in a direction perpendicular to the plane of incidence.
Therefore $\overrightarrow{E}$ in reflected light will vibrate in vertical plane with respect to plane of incidence
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.