Question

Two polaroide $A$ and $B$ are placed in such a way that the pass-axis of polaroids are perpendicular to each other Now, another polaroid $C$ is placed between $A$ and $B$ bisecting angle between them If intensity of unpolarized light is $I _0$ then intensity of transmitted light after passing through polaroid $B$ will be:

• A. $\frac{I_0}{8}$
• B. $Z erO$
• C. $\frac{I_0}{2}$
• D. $\frac{I_0}{4}$

Answer 1

Answer: (A)

$\frac{I_0}{8}$

Answer 2

IA​=2Io​​
IC=2Io​​cos245=4Io​​
IB​=IC​cos245=8Io​​