Student Login

Home›Chapters›Wave Optics PYQs›YDSE: Film, Medium & Two Wavelengths›Question 5

MHT CET 2026 (13 Apr, Shift 1) · YDSE: Film, Medium & Two Wavelengths

YDSE: Film, Medium & Two Wavelengths question from MHT CET 2026 (13 Apr, Shift 1)

Q5MHT CET 2026 · 13 APR · SHIFT 1Easy

YDSE: Film, Medium & Two Wavelengths

In Young's double slit experiment, the angular width of a fringe is found to be $0.2^\circ$ on a screen placed 1m away. The wavelength of light used in 600 nm. If the entire apparatus is immersed in water of refractive index 4/3. the angular width of the fringe will be

Show answer and solution

Answer: (b)

Angular width $\theta = \frac{\lambda}{d}$ ; in water $\lambda' = \frac{\lambda}{\mu}$ , so $\theta' = \frac{\theta}{\mu}$ .
$\theta' = \frac{0.2^\circ}{4/3} = 0.15^\circ$
So the answer is (b) $0.15^\circ$ .

Report a mistake

More questions on YDSE: Film, Medium & Two Wavelengths

In Young's double slit experiment, the fringe width of the interference pattern produced…JEE Main 2026 (5 Apr, Shift 1)
In the Young's double slit experiment, when a glass plate of thickness 't' is introduced…MHT CET 2026 (20 May, Shift 1)
In Young's experiment, one of the slit is covered with a transparent sheet of thickness…MHT CET 2026 (15 May, Shift 1)
A double slit experiment is performed with light of wavelength 500 nm. A thin film of…MHT CET 2026 (13 May, Shift 2)
In Young's double slit experiment, the slit width is 1 mm and screen is at a distance 2 m…MHT CET 2026 (13 May, Shift 1)
When a glass plate of refractive index 1.44 is introduced in the path of one of the…MHT CET 2026 (18 Apr, Shift 1)
In Young's double slit experiment, two slits S₁ and S₂ are 'd' distance apart and the…MHT CET 2026 (13 Apr, Shift 2)
In a double slit experiment the distance between the slits is 0.1 cm and the screen is…JEE Main 2026 (21 Jan, Shift 1)