A beam of unpolarized light of intensity $I_0$ 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:

Question

Aicharya · Accepted Answer

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

A beam of unpolarized light of intensity $I_0$ is passed through a polaroid $A$, then through another…

Solution