JEE Main Physics · Wave Optics

Young's Double Slit in JEE Main

Name: Young's Double Slit: JEE Main previous year questions
Creator: Lumi

Young's Double Slit (Physics, Wave Optics) came 27 times in 26 of the 42 JEE Main shifts Lumi analysed, across 11 distinct ideas. 16 of them came in 2024–26; it was last asked in 2026.

Questions: 27; in 26 shifts
Ideas asked: 11; 5 asked more than once
Numerical answer: 12; 44% of its questions
Pattern: Asked most years; last asked 2026

Questions each year

In the shifts Lumi analysed for each year.

Difficulty and format

Easy 14Medium 13Hard 0

Format

Single correct14 Q
Numerical value12 Q
Diagram based1 Q

Ideas inside the topic

11 ideas

YDSE Fringe Width7 Q
Intensity at Fractional Path Differences5 Q
Resultant Intensity Formula5 Q
Intensity Ratio from Slit Widths2 Q
Fringe Shift by Thin Slab2 Q
Exact Path Difference without Approximation1 Q
Intensity Exactly Opposite a Slit1 Q
Effect of Medium on Fringes1 Q
Position of nth Fringe1 Q
Coincidence of Polychromatic Fringes1 Q
White Light Interference1 Q

Where it sits

Part of Wave Optics, which had 44 questions in all. Young's Double Slit accounts for 61% of them. In Lumi's JEE taxonomy it belongs to Optics.

Every question

All 27 Young's Double Slit questions

Newest first, each with its options and official answer.

2 Apr 2026, Shift 2 · Q46In a Young's double slit experiment, the intensity at some point on the screen is found to be $\frac{3}{4}$ times of the maximum of the…MediumNumerical value
4 Apr 2026, Shift 2 · Q50In a double slit experiment, when one of the slits is covered by a transparent mica sheet of refractive index 1.56, the central fringe…MediumNumerical value
5 Apr 2026, Shift 1 · Q39In Young's double slit experiment, the fringe width of the interference pattern produced on the screen is $2.4\ \mu$ m. If the experiment…EasySingle correct
5 Apr 2026, Shift 2 · Q42The maximum intensity in a Young's double slit experiment is $I_0$ . Distance between the slits ( $d$ ) is $5\lambda$ , where $\lambda$ is the…MediumSingle correct
6 Apr 2026, Shift 1 · Q36In interference experiment the path difference between two interfering waves at a point $A$ on the screen is $\lambda/3$ , where $\lambda$ …EasySingle correct
6 Apr 2026, Shift 2 · Q45In a Young double slit experiment, the wavelength of incident light is 6000 Å, the separation between slits $S_1$ and $S_2$ is 5 cm and…MediumDiagram basedHas a figure
3 Apr 2025, Shift 1 · Q50Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The difference between the maximum and minimum…EasyNumerical value
3 Apr 2025, Shift 2 · Q41Two monochromatic light beams have intensities in the ratio 1:9. An interference pattern is obtained by these beams. The ratio of the…EasySingle correct
3 Apr 2025, Shift 2 · Q43Width of one of the two slits in a Young's double slit interference experiment is half of the other slit. The ratio of the maximum to the…MediumSingle correct
7 Apr 2025, Shift 1 · Q41Two plane polarized light waves combine at a certain point whose electric field components are $E_1 = E_0 \sin\omega t$ …EasySingle correct
8 Apr 2025, Shift 2 · Q42In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by a green filter.…MediumSingle correct
6 Apr 2024, Shift 2 · Q54Two coherent monochromatic light beams of intensities $I$ and $4I$ are superimposed. The difference between maximum and minimum possible…EasyNumerical value
9 Apr 2024, Shift 1 · Q59In a Young's double slit experiment, the intensity at a point is $\left(\frac{1}{4}\right)^{th}$ of the maximum intensity, the minimum…MediumNumerical value
9 Apr 2024, Shift 2 · Q52Monochromatic light of wavelength $500$ nm is used in Young's double slit experiment. An interference pattern is obtained on a screen.…MediumNumerical value
29 Jan 2024, Shift 1 · Q59In a double slit experiment shown in figure, when light of wavelength 400 nm is used, dark fringe is observed at $P$ . If D=0.2 m, the…MediumNumerical valueHas a figure
31 Jan 2024, Shift 1 · Q59Two waves of intensity ratio 1:9 cross each other at a point. The resultant intensities at that point, when (a) Waves are incoherent is…MediumNumerical value
8 Apr 2023, Shift 2 · Q46The width of fringe is 2 mm on the screen in a double slits experiment for the light of wavelength of 400 nm. The width of the fringe for…EasySingle correct
13 Apr 2023, Shift 2 · Q46In a Young's double slits experiment, the ratio of amplitude of light coming from slits is 2:1. The ratio of the maximum to minimum…EasySingle correct
28 Jul 2022, Shift 1 · Q53In a Young's double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes' separation…EasyNumerical value
29 Jun 2022, Shift 1 · Q49Using Young's double slit experiment, a monochromatic light of wavelength 5000 $\mathrm{\AA}$ produces fringes of fringe width 0.5 mm. If…EasySingle correct
3 Aug 2021, Shift 2 · Q27In Young's double slit experiment, 58 fringes are observed in the field of view when a light of wavelength 6000 $\mathrm{\AA}$ was used.…EasyNumerical value
25 Jul 2021, Shift 1 · Q8In the Young's double slit experiment, the distance between the slits varies in time as $d(t)=d_0+a_0\sin\omega t$ ; where $d_0$ , $\omega$ …MediumSingle correct
18 Mar 2021, Shift 1 · Q7In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The…EasySingle correct
9 Jan 2020, Shift 2 · Q24In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 nm is used. Ten…EasyNumerical value
2 Sep 2020, Shift 1 · Q17Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source ( $\lambda=632.8$ nm). The…EasySingle correct
6 Sep 2020, Shift 2 · Q24A Young's double-slit experiment is performed using monochromatic light of wavelength $\lambda$ . The intensity of light at a point on the…MediumNumerical value
2 Apr 2017 (offline) · Q23In a Young's double slit experiment, slits are separated by 0.5 mm, and the screen is placed 150 cm away. A beam of light consisting of…MediumSingle correct