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Friday, 9 October

JEE Main 2026 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2026, Shift 1, Physics Q47

Question 47 of 75 in this shift, Physics question 22 of 25, Section B.

An unpolarized light of intensity I0I_0 passes through polarizer and then through a certain optically active solution and finally it goes to analyser. If the angle between analyser and polariser is 0°0° and intensity of light emerged from analyser is 38I0\frac{3}{8}I_0, the angle of rotation of the light by the solution with respect to analyser is ________ degrees.

Official answer

30

NTA final key.

Chapter
Wave Optics
Topic
Polarization
Idea tested
Malus's Law Calculation

Same idea in other shifts

Asked 3× in all
  1. 4 Apr 2026, Shift 2 · Q42An unpolarized light of certain intensity passes through a combination of two polarizers whose transmission axes are at 30∘30^\circ and…MediumSingle correct
  2. 30 Jan 2024, Shift 2 · Q45A beam of unpolarised light of intensity IoI_o is passed through a polaroid AA and then through another polaroid BB which is oriented so…EasySingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.