Question 400: Waves 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:

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

$$\frac{I_0}{32}$$

Waves 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: