JEE Main 2024PhysicsRay OpticsMediumMCQ

JEE Main 2024 — Ray Optics Question with Solution

JEE Main 2024 (31 Jan Shift 1)

Question

The refractive index of a prism with apex angle A is cotA2. The angle of minimum deviation is :

Choose an option

Show full solutionCorrect option: D
Correct answer
Dδm=180°-2A

Step-by-step explanation

As we know, μ=sinA+δm2sinA2

⇒cosA2sinA2=sinA+δm2sinA2

⇒sinπ2-A2=sinA+δm2

⇒π2-A2=A2+δm2

⇒δm=π-2A=180°-2A

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About this question

This is a previous-year question from JEE Main 2024, covering the Ray 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.