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Saturday, 31 October

JEE Main · Physics · Ray Optics and Optical Instruments

Apparent Depth and Shift

JEE Main asked Apparent Depth and Shift 4 times in 4 of the 108 shifts Lumi analysed, in 2022, 2023 and 2024. It belongs to Refraction and Snell's Law, in Ray Optics and Optical Instruments (Physics). The longest wait between two years asking it was 1 year. In 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2022
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200’210.03’220.14’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 2 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
  • 20232 of 12
  • 20221 of 24
  • 20210 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: multi-step.

  • Refractive index by travelling microscope with vernier
  • Image distance with water layer and plane mirror

Difficulty

Easy 0Medium 2Hard 2

2 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. 6 Apr 2024, Shift 2 · Q50In finding out refractive index of glass slab the following observations were made through travelling microscope 50 vernier scale division…HardSingle correct
  2. 12 Apr 2023, Shift 1 · Q46An ice cube has a bubble inside. When viewed from one side the apparent distance of the bubble is 12 cm. When viewed from the opposite…MediumSingle correct
  3. 11 Apr 2023, Shift 2 · Q56As shown in the figure, a plane mirror is fixed at a height of 50 cm50\ \mathrm{cm} from the bottom of tank containing water…HardNumerical valueHas a figure
  4. 30 Jul 2022, Shift 2 · Q22A ring is placed at the bottom of a trough containing four immiscible liquids of refractive indices 1.0, 2.0, 3.0 and 4.0 poured one above…MediumNumerical value

Shifts: 30 Jul 2022, Shift 2, 11 Apr 2023, Shift 2, 12 Apr 2023, Shift 1, 6 Apr 2024, Shift 2.

Same topic

Other ideas in Refraction and Snell's Law

Refraction and Snell's Law has 18 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas