Question 97: Waves Optics

Question

A beam of unpolarised light of intensity $$I_0$$ is passed through a polaroid $$A$$ and then through another polaroid $$B$$ which is oriented so that its principal plane makes an angle of $$45^{\circ}$$ relative to that of $$A$$. The intensity of emergent light is:

Accepted Answer

Intensity of emergent light
$$=\frac{\mathrm{I}_0}{2} \cos ^2 45^{\circ}=\frac{\mathrm{I}_0}{4}$$

Answer

$$I_0 / 2$$

Answer

$$I_0 / 8$$

Answer

$$I_0 / 4$$

Answer

$$I_0$$

Waves Optics

A beam of unpolarised light of intensity $I_0 is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of 45^{\circ} relative to that of A$. The intensity of emergent light is:

Choose the correct answer: