Learn

Saturday, 31 October

JEE Main · Physics · Wave Optics

Malus's Law Calculation

JEE Main asked Malus's Law Calculation 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2023, 2024 and 2026. It belongs to Polarization, in Wave Optics (Physics). The longest wait between two years asking it was 2 years. In 2022 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
5 of 8
First asked
2021
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.150.30’170’200.03’210.07’220.07’230.05’240’250.22’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 2 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20262 of 9
  • 20250 of 8
  • 20241 of 18
  • 20231 of 12
  • 20222 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

  • Intensity through two polaroids
  • Intensity ratio through polarizer sequence

Difficulty

Easy 4Medium 3Hard 0

3 of the 7 questions had a numerical answer.

Every question

All 7 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 6 Apr 2026, Shift 1 · Q47An unpolarized light of intensity I0I_0 passes through polarizer and then through a certain optically active solution and finally it goes…MediumNumerical value
  2. 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
  3. 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
  4. 10 Apr 2023, Shift 1 · Q57Unpolarised light of intensity 32 Wm−232\,Wm^{-2} passes through the combination of three polaroids such that the pass axis of the last…MediumNumerical value
  5. 30 Jul 2022, Shift 2 · Q14Two poloroids P1_1 and P2_2 are placed parallel to each other with common axis.The light of intensity I0_0 passes through a polaroid…EasySingle correct
  6. 29 Jul 2022, Shift 2 · Q39An unpolarised light beam of intensity 2I02I_0 is passed through a polaroid P and then through another polaroid Q which is oriented in such…EasySingle correct
  7. 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

Shifts: 24 Feb 2021, Shift 1, 29 Jul 2022, Shift 2, 30 Jul 2022, Shift 2, 10 Apr 2023, Shift 1, 30 Jan 2024, Shift 2, 4 Apr 2026, Shift 2, 6 Apr 2026, Shift 1.

Same topic

Other ideas in Polarization

Polarization has 6 ideas JEE Main has asked; 2 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas