JEE Main Physics · Wave Optics

Single Slit Diffraction in JEE Main

Name: Single Slit Diffraction: JEE Main previous year questions
Creator: Lumi

Single Slit Diffraction (Physics, Wave Optics) came 7 times in 7 of the 42 JEE Main shifts Lumi analysed, across 5 distinct ideas. 6 of them came in 2024–26; it was last asked in 2026.

Questions: 7; in 7 shifts
Ideas asked: 5; 1 asked more than once
Numerical answer: 6; 86% of its questions
Pattern: Frequent; last asked 2026

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 4Medium 3Hard 0

Format

Numerical value6 Q
Single correct1 Q

Ideas inside the topic

5 ideas

Single Slit Minima Condition3 Q
Angular Width of Central Max1 Q
Secondary Maxima Condition1 Q
Resolving Power of a Telescope1 Q
Diffraction Envelope in YDSE1 Q

Where it sits

Part of Wave Optics, which had 44 questions in all. Single Slit Diffraction accounts for 16% of them. In Lumi's JEE taxonomy it belongs to Optics.

Every question

All 7 Single Slit Diffraction questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 1 · Q46In single slit diffraction pattern, the wavelength of light used is $628$ nm and slit width is $0.2$ mm, the angular width of central…EasyNumerical value
4 Apr 2026, Shift 1 · Q33A slit of width $a$ is illuminated by light of wavelength $\lambda$ . The linear separation between $1^{\text{st}}$ and $3^{\text{rd}}$ …EasySingle correct
8 Apr 2026, Shift 2 · Q47Some distant star is to be observed by some telescope of diameter of objective lens $a$ , at an angular resolution of $3.0 \times 10^{-7}$ …EasyNumerical value
2 Apr 2025, Shift 1 · Q50If the measured angular separation between the second minimum to the left of the central maximum and the third minimum to the right of the…MediumNumerical value
4 Apr 2025, Shift 2 · Q46In a Young's double slit experiment, two slits are located 1.5 mm apart. The distance of screen from slits is 2 m and the wavelength of…MediumNumerical value
8 Apr 2024, Shift 1 · Q59A parallel beam of monochromatic light of wavelength 600 nm passes through single slit of 0.4 mm width. Angular divergence corresponding…EasyNumerical value
24 Jun 2022, Shift 1 · Q55Sodium light of wavelengths 650 nm and 655 nm is used to study diffraction at a single slit of aperture 0.5 mm. The distance between the…MediumNumerical value