Question

At what angle should the axes of two polaroids be placed so as to reduce the intensity of the incident unpolarized light to 13.

Answer 1

Answer:

θ = 66.90°

Explanation:

we know that

$I= \frac{I_0}{2}cos^2\theta$

I= intensity of polarized light =1

I_o= intensity of unpolarized light = 13

putting vales we get

$1= \frac{13}{2}cos^2\theta$

⇒$\theta=cos^{-1} \sqrt{\frac{1}{6.5} }$

therefore θ = 66.90°