Question

An unpolarised beam of intensity I₀ is incident on a pair of nicol prisms making an angle of 60ŗ with each other. The intensity of light emerging from the pair is –

• A. I₀
• B. $\frac{I_{0}}{2}$
• C. $\frac{I_{0}}{4}$
• D. $\frac{I_{0}}{8}$

Answer 1

Answer: (D)

$\frac{I_{0}}{8}$

Answer 2

Intensity of light emerging from I^st prism = I₀/2 and intensity of light emerging from second prism is = $\frac{I_{0}}{2}\cos^{2}60º = \frac{I_{0}}{8}$