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:

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) (I0/8) (B) ZerO (C) (I0/2) (D) (I0/4)

Tardigrade Admin · Accepted Answer

IA=(Io/2) I C=(Io/2) cos 2 45=(Io/4) IB=IC cos 2 45=(Io/8)

$\frac{I _{0}}{8}$

ZerO

$\frac{I _{0}}{2}$

$\frac{I _{0}}{4}$

$I_{A} = \frac{I _{o}}{2}$
$I C = \frac{I _{o}}{2} cos^{2} 45 = \frac{I _{o}}{4}$
$I_{B} = I_{C} cos^{2} 45 = \frac{I _{o}}{8}$

8I0​​

ZerO

2I0​​

4I0​​

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

$\frac{I _{0}}{8}$

$\frac{I _{0}}{2}$

$\frac{I _{0}}{4}$

$I_{A} = \frac{I _{o}}{2}$
$I C = \frac{I _{o}}{2} cos^{2} 45 = \frac{I _{o}}{4}$
$I_{B} = I_{C} cos^{2} 45 = \frac{I _{o}}{8}$