JEE Main Physics · Wave Optics

Intensity at Fractional Path Differences

Intensity at Fractional Path Differences (Wave Optics) was asked 5 times in 5 JEE Main shifts, 2020–2026, out of the 42 shifts Lumi analysed. 3 of the 5 had a numerical answer.

Times asked: 5; in 5 shifts
Years: 2020–2026
Usual format: Numerical value; Calculation
Pattern: Frequent; repeats across shifts

How it is asked

Path difference from intensity fraction
Intensity ratio at fractional path differences

Difficulty

Easy 1Medium 4Hard 0

Where it sits

Chapter: Wave Optics. Topic: Young's Double Slit, 27 questions over 11 ideas.

All 5 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
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
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
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