Interference fringes are produced by a double slit arrangement  and a piece of plane parallel
Channel: Doubtnut
Date: 05/07/2020

Interference fringes are produced by a double slit arrangement  and a piece of plane parallel glass of refractive index 1.5 is interposed in one of  the interfering beam. If the fringes are displaced through 30 fringe widths for  light of wavelength `6xx 10^(-5) cm`,  find the thickness of the plate.