JEE Main · Physics · Wave Optics
Exact Path Difference without Approximation
JEE Main asked Exact Path Difference without Approximation once in the 108 shifts Lumi analysed, on 29 Jan 2024, Shift 1. It belongs to Young's Double Slit, in Wave Optics (Physics).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2024
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2024. 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: 0 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: 0 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Numerical value is the usual form. Skill tested: multi-step.
- Slit separation for dark fringe at point
Difficulty
1 of the 1 question had a numerical answer.
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.
Shift: 29 Jan 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.
- YDSE Fringe Width14× · 2024
- Resultant Intensity Formula13× · 2025
- Intensity at Fractional Path Differences6× · 2026
- Intensity Ratio from Slit Widths6× · 2025
- Fringe Shift by Thin Slab3× · 2026
- Effect of Medium on Fringes2× · 2026
- Coinciding Maxima of Two Wavelengths2× · 2024
- Angular Fringe Width2× · 2022
- Intensity Exactly Opposite a Slitonce · 2026
- White Light Interferenceonce · 2025
- Position of nth Maximum and Minimumonce · 2022
- Fringe Visibility and Contrastonce · 2021