A thin sheet of glass (refractive index 1.5) of thickness 6 microns, introduced in the path of one
Channel: Doubtnut
Date: 2020-08-30

A thin sheet of glass (refractive index 1.5) of thickness 6 microns, introduced in the path of one of the interfering beams in a double-slit experiment shift the central fringe to a position earlier occupied by the fifth bright fringe. The wavelength of light used is