Question 396: Wave Optics

Question

A beam of unpolarized light of intensity I0 is passed through a polaroid A, then through another polaroid B,
oriented at $60^\circ$ and finally through another polaroid C, oriented at 45$^\circ$ relative to B as shown. The intensity of
emergent light is:
![](https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1lxyl5zvi/24ce02ba-d187-4a03-9b6d-4470422f381d/2e032fe0-353e-11ef-b539-2dcd72d77d10/file-jaoe38c1lxyl5zvj.png?format=png)

Accepted Answer

$\begin{aligned}
& I_1=\frac{I_0}{2} \
& I_B=\left(I_1ight) \cos ^2 60^{\circ} \
& =\frac{I_0}{2}\left(\frac{1}{2}ight)^2=\frac{I_0}{8} \
& I_C=I_B \cos ^2 45^{\circ} \
& =\frac{I_0}{8} 	imes\left(\frac{1}{\sqrt{2}}ight)^2=\frac{I_0}{16}
\end{aligned}$

Answer

$\frac{I_0}{16}$

Answer

$\frac{I_0}{4}$

Answer

$\frac{I_0}{2}$

Answer

$\frac{I_0}{32}$

Wave Optics

A beam of unpolarized light of intensity I0 is passed through a polaroid A, then through another polaroid B, oriented at 60^\circ and finally through another polaroid C, oriented at 45^\circ relative to B as shown. The intensity of emergent light is:

Choose the correct answer: