Verified Solution • 2025–26 Session
moderate
QNEET-2022-Ph-432: NEET 2022 Physics - Class 12 NEET-2022-Ph-432 Solution: In a Young's double slit experiment a student observes 8…
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 6 8 9 12
Multiple Choice Options
- A 6
- B 8
- C 9
- D 12
Step-by-Step Verified Solution
_ = _ D d
Let length of segment of screen = l
_ l = 8 _ 1 = 8 _ 1 D d ..... (1)
and l = n _ 2 = n _ 2 D d .... (2)
from (1) and (2)
8 _ 1 = n _ 2
8(600 nm) = n(400 nm)
n = 12