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Saturday, 31 October

JEE Main · Physics · Ray Optics and Optical Instruments

Minimum Deviation Condition

JEE Main asked Minimum Deviation Condition 9 times in 9 of the 108 shifts Lumi analysed, in 2021, 2022, 2024, 2025 and 2026. It belongs to Prism Deviation, in Ray Optics and Optical Instruments (Physics). The longest wait between two years asking it was 2 years. In 2021, 2024 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
9
in 9 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.

00.150.30’170’200.07’210.03’220’230.14’240.13’250.22’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 3 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20243 of 18
  • 20230 of 12
  • 20221 of 24
  • 20212 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.

  • Ratio of angles for thin prism at minimum deviation
  • Minimum deviation from speed in prism

Difficulty

Easy 2Medium 7Hard 0

3 of the 9 questions had a numerical answer.

Every question

All 9 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 1 · Q40A ray of light passing through an equilateral prism is having velocity 2.12×1082.12 \times 10^8 m/s in the prism material, then the minimum…MediumSingle correct
  2. 2 Apr 2026, Shift 1 · Q40For a thin symmetric prism made of glass (refractive index 1.51.5), the ratio of incident angle and minimum deviation will be _________.MediumSingle correct
  3. 3 Apr 2025, Shift 1 · Q41Consider following statements for refraction of light through prism, when angle of deviation is minimum. A. The refracted ray inside prism…MediumOther
  4. 31 Jan 2024, Shift 1 · Q45The refractive index of a prism with apex angle AA is cot⁡A/2\cot A/2. The angle of minimum deviation is :MediumSingle correct
  5. 27 Jan 2024, Shift 1 · Q45If the refractive index of the material of a prism is cot⁡(A2)\cot\left(\frac{A}{2}\right), where A is the angle of prism then the angle of…MediumSingle correct
  6. 6 Apr 2024, Shift 1 · Q51The refractive index of prism is μ=3\mu = \sqrt{3} and the ratio of the angle of minimum deviation to the angle of prism is one. The value…MediumNumerical value
  7. 30 Jun 2022, Shift 1 · Q58The refractive index of an equilateral prism is 2\sqrt{2} . The angle of emergence under minimum deviation position of prism, in degree,…EasyNumerical value
  8. 25 Jul 2021, Shift 2 · Q17A prism of refractive index μ\mu and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of…MediumSingle correct
  9. 22 Jul 2021, Shift 2 · Q24A ray of light passing through a prism (μ=3\mu = \sqrt{3}) suffers minimum deviation. It is found that the angle of incidence is double the…EasyNumerical value

Shifts: 22 Jul 2021, Shift 2, 25 Jul 2021, Shift 2, 30 Jun 2022, Shift 1, 27 Jan 2024, Shift 1, 31 Jan 2024, Shift 1, 6 Apr 2024, Shift 1, 3 Apr 2025, Shift 1, 2 Apr 2026, Shift 1, 5 Apr 2026, Shift 1.

Same topic

Other ideas in Prism Deviation

Prism Deviation has 9 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas