JEE Main Physics · Ray Optics and Optical Instruments

Prism Deviation in JEE Main

Name: Prism Deviation: JEE Main previous year questions
Creator: Lumi

Prism Deviation (Physics, Ray Optics and Optical Instruments) came 8 times in 8 of the 42 JEE Main shifts Lumi analysed, across 4 distinct ideas. 7 of them came in 2024–26; it was last asked in 2026.

Questions: 8; in 8 shifts
Ideas asked: 4; 2 asked more than once
Numerical answer: 2; 25% of its questions
Pattern: Frequent; last asked 2026

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 2Medium 6Hard 0

Format

Single correct5 Q
Numerical value2 Q
Other1 Q

Ideas inside the topic

4 ideas

Minimum Deviation Condition4 Q
Prism Refractive Index2 Q
Achromatic Prism Combination1 Q
TIR at Second Face Condition1 Q

Where it sits

Part of Ray Optics and Optical Instruments, which had 66 questions in all. Prism Deviation accounts for 12% of them. In Lumi's JEE taxonomy it belongs to Optics.

Every question

All 8 Prism Deviation questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 1 · Q40For a thin symmetric prism made of glass (refractive index $1.5$ ), the ratio of incident angle and minimum deviation will be _________.MediumSingle correct
2 Apr 2026, Shift 2 · Q41One side of an equilateral prism is painted by a transparent material of refractive index $n_2$ . The refractive index of prism is 1.6. The…MediumSingle correctHas a figure
5 Apr 2026, Shift 1 · Q40A ray of light passing through an equilateral prism is having velocity $2.12 \times 10^8$ m/s in the prism material, then the minimum…MediumSingle correct
6 Apr 2026, Shift 2 · Q42Angle of minimum deviation is equal to the half of the angle of prism in an equilateral prism. The refractive index of the prism is…EasySingle correct
2 Apr 2025, Shift 2 · Q49A ray of light suffers minimum deviation when incident on a prism having angle of the prism equal to $60^\circ$ . The refractive index of…EasyNumerical value
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
31 Jan 2024, Shift 1 · Q45The refractive index of a prism with apex angle $A$ is $\cot A/2$ . The angle of minimum deviation is :MediumSingle correct
16 Mar 2021, Shift 2 · Q29A deviation of $2^\circ$ is produced in the yellow ray when prism of crown and flint glass are achromatically combined. Taking dispersive…MediumNumerical value