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:
Solution
<p>Intensity of emergent light</p>
<p>$=\frac{\mathrm{I}_0}{2} \cos ^2 45^{\circ}=\frac{\mathrm{I}_0}{4}$</p>
About this question
Subject: Physics · Chapter: Optics · Topic: Reflection and Mirrors
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