NEET UG 2022 · Physics · Question 15
NEET 2022 Physics, question 15
Question 15 of the NEET 2022 paper (code R1) is a Physics question from Wave Optics. Its idea, Fringe Width Calculation, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q15 · Physics
In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is :
- 112Official answer
- 26
- 38
- 49
Official answer: option 1 · NTA final answer key
Same idea
The only question on Fringe Width Calculation
No other NEET paper from 2017–2026 tested this exact idea.
Fringe Width Calculation: every question and how it was framed
The chapter
Wave Optics in ten years of NEET
15 questions from 2017–2026, asked in 8 of 10 papers, about 1.5 a paper. Young's Double Slit alone had 7.