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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 is placed between and bisecting angle between them. If intensity of unpolarized light is $\mathrm{I_{0}}$ then intensity of transmitted light after passing through polaroid B will be:
Option: 1
$\mathrm{\frac{I_{0}}{4}}$

Option: 2
$\mathrm{\frac{I_{0}}{2}}$

Option: 3
$\mathrm{Zero}$

Option: 4
$\mathrm{\frac{I_{0}}{8}}$

Answers (1)

best_answer

$\mathrm{After\: A,I=\frac{I}{2}}$

$\mathrm{After\: C,I=\frac{I_{0}}{2}\cos ^{2}45^{0}=\frac{I_{0}}{4}}$

$\mathrm{After\: B,I=\frac{I_{0}}{2}\cos ^{2}45^{0}=\frac{I_{0}}{8}}$

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