JEE Main · Physics · Ray Optics and Optical Instruments
TIR at Second Face Condition
JEE Main asked TIR at Second Face Condition 2 times in 2 of the 108 shifts Lumi analysed, in 2021 and 2026. It belongs to Prism Deviation, in Ray Optics and Optical Instruments (Physics). The longest wait between two years asking it was 5 years.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 2 of 8
- First asked
- 2021
- last in 2026
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2021 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 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.
How JEE Main framed it
Numerical value is the usual form. Skill tested: multi-step.
- Condition for total internal reflection in prism
- Angle of incidence from critical angle at second face
Difficulty
1 of the 2 questions had a numerical answer.
Every question
All 2 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 2 Apr 2026, Shift 2 · Q41One side of an equilateral prism is painted by a transparent material of refractive index . The refractive index of prism is 1.6. The…MediumSingle correctHas a figure
- 3 Aug 2021, Shift 1 · Q30A ray of monochromatic light is incident on one refracting face of prism of angle 75°. It passes through the prism and is incident on the…MediumNumerical value
Shifts: 3 Aug 2021, Shift 1, 2 Apr 2026, Shift 2.
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.
- Minimum Deviation Condition9× · 2026
- Prism Refractive Index3× · 2026
- Achromatic Prism Combination2× · 2022
- Angular Dispersiononce · 2024
- Liquid-Filled Equilateral Prismonce · 2023
- Grazing Emergence Conditiononce · 2022
- Base Parallel Property at Minimum Deviationonce · 2021
- Prism in Surrounding Mediumonce · 2021