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Saturday, 31 October

JEE Main · Physics · Wave Optics

YDSE Fringe Width

JEE Main asked YDSE Fringe Width 14 times in 14 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023 and 2024. It belongs to Young's Double Slit, in Wave Optics (Physics). The longest wait between two years asking it was 1 year. In 2020, 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
14
in 14 shifts
Years
5 of 8
First asked
2020
last in 2024
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

00.150.30’170.17’200.24’210.10’220.07’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 7 in 24 shifts · 2022: 3 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20231 of 12
  • 20223 of 24
  • 20217 of 24
  • 20202 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Distance between fringes in ydse
  • Fringe width variation with slit separation

Difficulty

Easy 11Medium 3Hard 0

7 of the 14 questions had a numerical answer.

Every question

All 14 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 5 Apr 2024, Shift 1 · Q58In Young's double slit experiment, carried out with light of wavelength 5000 Å, the distance between the slits is 0.3 mm and the screen is…EasyNumerical value
  2. 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
  3. 29 Jun 2022, Shift 2 · Q59In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If…MediumNumerical value
  4. 29 Jun 2022, Shift 1 · Q49Using Young's double slit experiment, a monochromatic light of wavelength 5000 A˚\mathrm{\AA} produces fringes of fringe width 0.5 mm. If…EasySingle correct
  5. 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
  6. 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
  7. 25 Jul 2021, Shift 1 · Q8In the Young's double slit experiment, the distance between the slits varies in time as d(t)=d0+a0sin⁡ωtd(t)=d_0+a_0\sin\omega t ; where d0d_0, ω\omega…MediumSingle correct
  8. 26 Feb 2021, Shift 1 · Q17In a Young’s double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength…EasySingle correct
  9. 24 Feb 2021, Shift 2 · Q14If the source of light used in a Young's double slit experiment is changed from red to violet :EasySingle correct
  10. 31 Aug 2021, Shift 2 · Q24In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is 1.5 m away from the plane of slits. Distance…EasyNumerical value
  11. 26 Aug 2021, Shift 1 · Q27White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits is 0.3…MediumNumerical value
  12. 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 A˚\mathrm{\AA} was used.…EasyNumerical value
  13. 2 Sep 2020, Shift 2 · Q16In a Young’s double slit experiment, 16 fringes are observed in a certain segment of the screen when light of wavelength 700 nm is used.…EasySingle correct
  14. 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

Shifts: 9 Jan 2020, Shift 2, 2 Sep 2020, Shift 2, 24 Feb 2021, Shift 2, 26 Feb 2021, Shift 1, 18 Mar 2021, Shift 1, 25 Jul 2021, Shift 1, 3 Aug 2021, Shift 2, 26 Aug 2021, Shift 1, 31 Aug 2021, Shift 2, 29 Jun 2022, Shift 2, 29 Jun 2022, Shift 1, 28 Jul 2022, Shift 1, 8 Apr 2023, Shift 2, 5 Apr 2024, Shift 1.

Same topic

Other ideas in Young's Double Slit

Young's Double Slit has 16 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas