Q. Two Nicols are oriented with their principal planes making an angle of $60{^\circ}$. The percentage of incident unpolarised light which passes through the system is
A) 50%
B) 100%
C) 12.5%
D) 37.5%
Explanation
(c) Intensity of polarized light from first polarizer $= \frac{100}{2} = 50$
$I = 50\cos^{2}{60{^\circ} = \frac{50}{4} = 12.5}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.