Student Login

Home›Chapters›Wave Optics PYQs›YDSE: Film, Medium & Two Wavelengths›Question 46

MHT CET 2023 (10 May, Shift 2) · YDSE: Film, Medium & Two Wavelengths

YDSE: Film, Medium & Two Wavelengths question from MHT CET 2023 (10 May, Shift 2)

Q46MHT CET 2023 · 10 MAY · SHIFT 2Medium

YDSE: Film, Medium & Two Wavelengths

In Young's double slit experiment, the two slits are 'd' distance apart. Interference pattern is observed on a screen at a distance 'D' from the slits. A dark fringe is observed on a screen directly opposite to one of the slits. The wavelength of light is

Show answer and solution

Answer: (d)

Path difference in front of a slit $= \dfrac{d^2}{2D}$ .
Nearest (first) dark fringe: $\dfrac{d^2}{2D} = \dfrac{\lambda}{2} \Rightarrow \lambda = \dfrac{d^2}{D}$
So the answer is (d) $\frac{d^2}{D}$ .

Report a mistake

More questions on YDSE: Film, Medium & Two Wavelengths

In a Young's double slit experiment, two slits are illuminated with a light of wavelength…JEE Main 2023 (29 Jan, Shift 1)
Two light waves of wavelengths 800 and 600 nm are used in Young's double slit experiment…JEE Main 2023 (31 Jan, Shift 2)
In Young's double slit experiment, the fringe width is 12 mm. If the entire arrangement…JEE Main 2022 (26 Jul, Shift 1)
In a Young's double slit experiment, an angular width of the fringe is 0.35 ° on a screen…JEE Main 2022 (28 Jun, Shift 2)
In Young's double slit experiment performed using a monochromatic light of wavelength λ…JEE Main 2022 (28 Jun, Shift 2)
In Young's double slit experiment the two slits are 0.6 mm distance apart. Interference…JEE Main 2022 (27 Jun, Shift 1)
A double slit experiment is immersed in water of refractive index 1.33. The slit…MHT CET 2021 (21 Sep, Shift 1)
The difference in the number of waves when yellow light propagates through air and vacuum…JEE Main 2021 (27 Jul, Shift 2)