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Saturday, 31 October

JEE Main · Physics · Ray Optics and Optical Instruments

Thin Lens Formula

JEE Main asked Thin Lens Formula 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2022, 2023 and 2024. It belongs to Lens Maker's Formula, in Ray Optics and Optical Instruments (Physics). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
4 of 8
First asked
2021
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.03’210.03’220.07’230.05’240’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20250 of 8
  • 20241 of 18
  • 20231 of 12
  • 20221 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: multi-step.

  • Statement i/ii on lens images
  • Final image position through two lenses

Difficulty

Easy 0Medium 3Hard 1

1 of the 4 questions had a numerical answer.

Every question

All 4 questions

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

  1. 9 Apr 2024, Shift 1 · Q45Given below are two statements : Statement (I) : When an object is placed at the centre of curvature of a concave lens, image is formed at…MediumTwo statements
  2. 10 Apr 2023, Shift 2 · Q57A point object, 'O' is placed in front of two thin symmetrical coaxial convex lenses L1L_1 and L2L_2 with focal length 24 cm and 9 cm…MediumNumerical valueHas a figure
  3. 25 Jul 2022, Shift 2 · Q38For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm form the…HardSingle correct
  4. 31 Aug 2021, Shift 1 · Q6An object is placed at the focus of concave lens having focal length ff. What is the magnification and distance of the image from the…MediumSingle correct

Shifts: 31 Aug 2021, Shift 1, 25 Jul 2022, Shift 2, 10 Apr 2023, Shift 2, 9 Apr 2024, Shift 1.

Same topic

Other ideas in Lens Maker's Formula

Lens Maker's Formula has 16 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas