After passing through a polariser a linearly polarised light of intensity I is incident on an analyser making an angle of 30 ° with that of the polariser. The intensity of light emitted from the analyser will be (a) 2I/3 (b) I/2 (c) I/3 (d) 3I/4

Answer: (d). Malus's law: I' = Icos ²θ. I' = Icos ² 30° = I×3/4 So the answer is (d) 3I/4.

After passing through a polariser a linearly polarised light of… | NEET 2022 (Phase 2)

Q41NEET 2022 · PHASE 2Easy

Polarisation

After passing through a polariser a linearly polarised light of intensity I is incident on an analyser making an angle of 30 ${}^\circ$ with that of the polariser. The intensity of light emitted from the analyser will be

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Answer: (d)

Malus's law: $I' = I\cos^2\theta$ .
$I' = I\cos^2 30^\circ = I\times\dfrac{3}{4}$
So the answer is (d) $\dfrac{3I}{4}$ .

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