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Two nicol prisms are inclined to reach other at an angle 30°. If I is the intensity of ordinary light incident on the first prism, then the intensity of light emerges from the second prism will be

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$\frac{3 I}{8}$

$\frac{I}{2}$

$\frac{I}{4}$

$\frac{3 I}{4}$

answer is D.

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Detailed Solution

After passing through the first nicol prism the intensity will be $\frac{I}{2}$

As the next nicol prism is placed at an angle of 30⁰

This will resultant an intensity $\frac{I_{0}}{2} \cos^{2} (30^{0}) = \frac{3 I_{0}}{8}$

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