JEE Main 2025 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 2 April 2025, Shift 2, Physics Q49

Question 49 of 75 in this shift, Physics question 24 of 25, Section B.

A ray of light suffers minimum deviation when incident on a prism having angle of the prism equal to

60^\circ

. The refractive index of the prism material is

\sqrt{2}

. The angle of incidence (in degrees) is __________.

Official answer

NTA final key.

Chapter: Ray Optics and Optical Instruments
Topic: Prism Deviation
Idea tested: Prism Refractive Index

Same idea in other shifts

Asked 3× in all

6 Apr 2026, Shift 2 · Q42Angle of minimum deviation is equal to the half of the angle of prism in an equilateral prism. The refractive index of the prism is…EasySingle correct
28 Jun 2022, Shift 1 · Q42The refracting angle of a prism is A and refractive index of the material of the prism is cot (A/2). Then the angle of minimum deviation…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.