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Saturday, 31 October

JEE Main · Physics · Wave Optics

Intensity at Fractional Path Differences

JEE Main asked Intensity at Fractional Path Differences 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2024 and 2026. It belongs to Young's Double Slit, in Wave Optics (Physics). The longest wait between two years asking it was 4 years. In 2020 and 2026 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
3 of 8
First asked
2020
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.20.40’170.17’200’210’220’230.05’240’250.33’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 3 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20263 of 9
  • 20250 of 8
  • 20241 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 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.

  • Path difference from intensity fraction
  • Intensity ratio at fractional path differences

Difficulty

Easy 2Medium 4Hard 0

3 of the 6 questions had a numerical answer.

Every question

All 6 questions

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

  1. 6 Apr 2026, Shift 2 · Q45In a Young double slit experiment, the wavelength of incident light is 6000 Å, the separation between slits S1S_1 and S2S_2 is 5 cm and…MediumDiagram basedHas a figure
  2. 6 Apr 2026, Shift 1 · Q36In interference experiment the path difference between two interfering waves at a point AA on the screen is λ/3\lambda/3, where λ\lambda…EasySingle correct
  3. 2 Apr 2026, Shift 2 · Q46In a Young's double slit experiment, the intensity at some point on the screen is found to be 34\frac{3}{4} times of the maximum of the…MediumNumerical value
  4. 9 Apr 2024, Shift 1 · Q59In a Young's double slit experiment, the intensity at a point is (14)th\left(\frac{1}{4}\right)^{th} of the maximum intensity, the minimum…MediumNumerical value
  5. 6 Sep 2020, Shift 2 · Q24A Young's double-slit experiment is performed using monochromatic light of wavelength λ\lambda. The intensity of light at a point on the…MediumNumerical value
  6. 8 Jan 2020, Shift 2 · Q17In a double-slit experiment, at a certain point on the screen the path difference between the two interfering waves is 18\frac{1}{8}th of…EasySingle correct

Shifts: 8 Jan 2020, Shift 2, 6 Sep 2020, Shift 2, 9 Apr 2024, Shift 1, 2 Apr 2026, Shift 2, 6 Apr 2026, Shift 2, 6 Apr 2026, 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