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Saturday, 31 October

JEE Main · Physics · Ray Optics and Optical Instruments

Lenses in Contact

JEE Main asked Lenses in Contact 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2022, 2024, 2025 and 2026. It belongs to Lens Maker's Formula, in Ray Optics and Optical Instruments (Physics). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
5
in 5 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, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.10.20’170’200.03’210.03’220’230.05’240.13’250.11’26

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

Shift by shift

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

  • 20261 of 9
  • 20251 of 8
  • 20241 of 18
  • 20230 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: calculation.

  • True statement selection on lens combination
  • Image distance for lenses in contact

Difficulty

Easy 2Medium 3Hard 0

1 of the 5 questions had a numerical answer.

Every question

All 5 questions

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

  1. 5 Apr 2026, Shift 2 · Q40A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for this…EasySingle correct
  2. 8 Apr 2025, Shift 2 · Q43A convex lens of focal length 30 cm is placed in contact with a concave lens of focal length 20 cm. An object is placed at 20 cm to the…MediumSingle correct
  3. 4 Apr 2024, Shift 1 · Q45An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is 25 D. Focal length…EasySingle correct
  4. 24 Jun 2022, Shift 1 · Q52Two identical thin biconvex lenses of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the…MediumNumerical value
  5. 27 Aug 2021, Shift 2 · Q14Curved surfaces of a plano-convex lens of refractive index μ1\mu_1 and a plano-concave lens of refractive index μ2\mu_2 have equal radius…MediumSingle correctHas a figure

Shifts: 27 Aug 2021, Shift 2, 24 Jun 2022, Shift 1, 4 Apr 2024, Shift 1, 8 Apr 2025, Shift 2, 5 Apr 2026, Shift 2.

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