Question

Two Nicols are oriented with their principal planes making an angle of 60⁰. The percentage of incident unpolarised light which passes through the system is-

• A. 50%
• B. 100%
• C. 12.5%
• D. 37.5%

Answer 1

Answer: (C)

12.5%

Answer 2

Intensity of polarized light from 1^st polarizer

= $\frac{100}{2}$= 50

I = 50 cos² 60⁰ = $\frac{50}{4}$ = 12.5%