JEE Main · Physics · Ray Optics and Optical Instruments
Numerical Aperture and Oil Immersion
JEE Main asked Numerical Aperture and Oil Immersion once in the 108 shifts Lumi analysed, on 27 Jul 2022, Shift 1. It belongs to Optical Instruments, in Ray Optics and Optical Instruments (Physics).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2022
- the only year
- Pattern
- Occasional
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2022. 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: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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.
How JEE Main framed it
Single correct is the usual form. Skill tested: conceptual.
- Resolving power change on oil immersion
Difficulty
The question was multiple choice.
Every question
The question
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
Shift: 27 Jul 2022, Shift 1.
Same topic
Other ideas in Optical Instruments
Optical Instruments has 11 ideas JEE Main has asked; 2 of them came up in more than one question.
- Microscope Tube Length2× · 2026
- Compound Microscope Magnification2× · 2021
- Resolving Poweronce · 2026
- Reflecting Telescopesonce · 2023
- Astronomical Telescope Magnificationonce · 2022
- Astigmatism and Cylindrical Lensesonce · 2021
- Hypermetropia Correctiononce · 2021
- Simple Microscope Magnificationonce · 2021
- Visual Angle and Angular Magnificationonce · 2021
- Telescope Tube Lengthonce · 2020