Question

In Young's double slit experiment, when a screen is placed at a distance of 1.2 m from the plane of the slits, the fringe width is 2 mm. If the setup is immersed in a liquid of refractive index 1.25 and the screen is moved to a distance of 1.8 m from the slits, then the fringe width is

• A. 2.4 mm
• B. 1.6 mm
• C. 2.1 mm
• D. 1.8 mm

Hint:

Fringe width increases with screen distance and decreases with refractive index of the medium.

Answer 1

The Correct Option is A