Two polaroids are placed in the path of unpolarized beam of intensity $${{I}_{0}}$$ such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle q with the polarization axis of first polaroid, is placed between these polaroids then the intensity of light emerging from the last polaroid will be [UPSEAT 2005]

Question

Two polaroids are placed in the path of unpolarized beam of intensity $${{I}_{0}}$$ such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle q with the polarization axis of first polaroid, is placed between these polaroids then the intensity of light emerging from the last polaroid will be           [UPSEAT 2005]

TuteeHUB · Accepted Answer

$$\left( \frac{{{I}_{0}}}{4} \right){{\sin }^{2}}2\theta $$

TuteeHUB · Answer

$$\left( \frac{{{I}_{0}}}{8} \right){{\sin }^{2}}2\theta $$

TuteeHUB · Answer

$$\left( \frac{{{I}_{0}}}{2} \right){{\cos }^{4}}\theta $$

TuteeHUB · Answer

$${{I}_{0}}{{\cos }^{4}}\theta $$

1.	Two polaroids are placed in the path of unpolarized beam of intensity \[{{I}_{0}}\] such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle q with the polarization axis of first polaroid, is placed between these polaroids then the intensity of light emerging from the last polaroid will be [UPSEAT 2005]
A.	\[\left( \frac{{{I}_{0}}}{8} \right){{\sin }^{2}}2\theta \]
B.	\[\left( \frac{{{I}_{0}}}{4} \right){{\sin }^{2}}2\theta \]
C.	\[\left( \frac{{{I}_{0}}}{2} \right){{\cos }^{4}}\theta \]
D.	\[{{I}_{0}}{{\cos }^{4}}\theta \]
Answer» B. \[\left( \frac{{{I}_{0}}}{4} \right){{\sin }^{2}}2\theta \]

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