JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 10 April 2023, Shift 1, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

Unpolarised light of intensity

32\,Wm^{-2}

passes through the combination of three polaroids such that the pass axis of the last polaroid is perpendicular to that of the pass axis of first polaroid. If intensity of emerging light is

3\,Wm^{-2}

, then the angle between pass axis of first two polaroids is ____________

^\circ

Official answer

30; 60

NTA final key: multiple answers accepted.

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

Same idea in other shifts

Asked 7× in all

4 Apr 2026, Shift 2 · Q42An unpolarized light of certain intensity passes through a combination of two polarizers whose transmission axes are at $30^\circ$ and…MediumSingle correct
6 Apr 2026, Shift 1 · Q47An unpolarized light of intensity $I_0$ passes through polarizer and then through a certain optically active solution and finally it goes…MediumNumerical value
30 Jan 2024, Shift 2 · Q45A beam of unpolarised light of intensity $I_o$ is passed through a polaroid $A$ and then through another polaroid $B$ which is oriented so…EasySingle correct
29 Jul 2022, Shift 2 · Q39An unpolarised light beam of intensity $2I_0$ is passed through a polaroid P and then through another polaroid Q which is oriented in such…EasySingle correct
30 Jul 2022, Shift 2 · Q14Two poloroids P $_1$ and P $_2$ are placed parallel to each other with common axis.The light of intensity I $_0$ passes through a polaroid…EasySingle correct
24 Feb 2021, Shift 1 · Q22An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the…EasyNumerical value

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.