JEE Main 2018PhysicsWave OpticsMediumMCQ

JEE Main 2018 — Wave Optics Question with Solution

JEE Main 2018 (16 Apr Online)

Question

Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I2 . If a third the polarizer C is placed between A and B the intensity of emergent light is reduced to I3 . The angle between the polarizers A and C is θ , then

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Show full solutionCorrect option: A
Correct answer
Acos⁡θ=2314

Step-by-step explanation



A and B have the same alignment of the transmission axis. Let's assume c is introduced at θ angle, ⇒I2cos2θ×cos2θ=I3⇒cos4θ=23
⇒cosθ=2314.

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About this question

This is a previous-year question from JEE Main 2018, covering the Wave Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.