JEE Main · Physics · Wave Optics

Rayleigh Criterion

JEE Main asked Rayleigh Criterion once in the 108 shifts Lumi analysed, on 9 Jan 2020, Shift 1. It belongs to Single Slit Diffraction, in Wave Optics (Physics).

Updated 2026-10-24

Times asked: 1; in 1 shift
Years: 1 of 8
First asked: 2020; the only year
Pattern: Gone quiet; asked once so far

Questions on this idea a shift, by year

2017–2026. Asked in 2020. 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: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 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.

20260 of 9
20250 of 8
20240 of 18
20230 of 12
20220 of 24
20210 of 24
20201 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.

Minimum resolvable separation for telescope

Difficulty

Easy 0Medium 1Hard 0

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.

9 Jan 2020, Shift 1 · Q16The aperture diameter of a telescope is 5 m. The separation between the moon and the earth is $4\times10^{5}$ km. With light of wavelength…MediumSingle correct

Shift: 9 Jan 2020, Shift 1.

Same topic

Other ideas in Single Slit Diffraction

Single Slit Diffraction has 9 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysis Chapter analysis Study this chapter All repeated ideas