Interference fringes were produced in Young's double-slit experiment using light of wavelength `5000
Channel: Doubtnut
Date: 2020-08-23

Interference fringes were produced in Young's double-slit experiment using light of wavelength `5000 Å`. When a film of thickness `2.5xx10^(-3) cm` was placed in front of one of the slits, the fringe pattern shifted by a distance equal to `20` fringe-widths. The refractive index of the material of the film is