NEET UG 2019 · Physics · Question 5
NEET 2019 Physics, question 5
Question 5 of the NEET 2019 paper (code P1) is a Physics question from Wave Optics. Its idea, Effect of Medium on Fringes, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q5 · Physics
In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1 m away, was found to be 0.2°. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water ?
- 10.266°
- 20.15°Official answer
- 30.05°
- 40.1°
Official answer: option 2 · NTA final answer key
Same idea
The only question on Effect of Medium on Fringes
No other NEET paper from 2017–2026 tested this exact idea.
Effect of Medium on Fringes: 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.