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Saturday, 31 October

JEE Main · Physics · Ray Optics and Optical Instruments

Lenses Separated by a Distance

JEE Main asked Lenses Separated by a Distance 6 times in 6 of the 108 shifts Lumi analysed, in 2017, 2021, 2023, 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 4 years, across 2018 and 2019, which Lumi has no shifts for.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
6 of 8
First asked
2017
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2017, 2021, 2023, 2024, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.510.83’170’200.03’210’220.07’230.05’240.13’250.11’26

Raw count: 2017: 1 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 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
  • 20231 of 12
  • 20220 of 24
  • 20211 of 24
  • 20200 of 12
  • 20171 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.

  • Final image through two separated lenses
  • Power of separated lens combination

Difficulty

Easy 1Medium 5Hard 0

1 of the 6 questions had a numerical answer.

Every question

All 6 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 · Q41An object ABAB is placed 15 cm on the left of a convex lens PP of focal length 10 cm. Another convex lens QQ is now placed 15 cm right…MediumSingle correct
  2. 7 Apr 2025, Shift 1 · Q27Two thin convex lenses of focal lengths 30 cm and 10 cm are placed coaxially, 10 cm apart. The power of this combination is:EasySingle correct
  3. 8 Apr 2024, Shift 2 · Q45The position of the image formed by the combination of lenses is :MediumDiagram basedHas a figure
  4. 12 Apr 2023, Shift 1 · Q59Two convex lenses of focal length 20 cm each are placed coaxially with a separation of 60 cm between them. The image of the distant object…MediumNumerical value
  5. 27 Aug 2021, Shift 1 · Q17Find the distance of the image from object O, formed by the combination of lenses in the figure :MediumDiagram basedHas a figure
  6. 2 Apr 2017 (offline) · Q22A diverging lens with magnitude of focal length 25 cm is placed at a distance of 15 cm from a converging lens of magnitude of focal length…MediumSingle correct

Shifts: 2 Apr 2017 (offline), 27 Aug 2021, Shift 1, 12 Apr 2023, Shift 1, 8 Apr 2024, Shift 2, 7 Apr 2025, Shift 1, 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