In Lloyd's mirror experiment (Fig.) a light wave emitted directly be the source `S` (narrow slit)
Channel: Doubtnut
Date: 2021-11-02

In Lloyd's mirror experiment (Fig.) a light wave emitted directly be the source `S` (narrow slit) interferes with the wave reflected form a mirror `M`. As s result, an interference fringe pattern is img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/IROD_V01_C05_E01_069_Q01.png" width="80%" formed on the screen `Sc`. the source and the mirror are separated by a distance `l = 100 cm`.At a certain position of the source the fringe width on the screen was equal to `Deltax = 0.25 mm`, and after source was moved away from the mirror plane by `Delta h = 0.60 mm`, the fringe width decreased `eta = 1.5` times. Find the wavelength of light.