An equiconvex lens of crown glass abd an equiconvex lens of flint glass make an achromatic
Channel: Doubtnut
Date: 2020-08-30

An equiconvex lens of crown glass abd an equiconvex lens of flint glass make an achromatic system.The radius of curvature of convex lens is 0.54 m. If the focal length of the combination for the mean colour is 1.54m and the refractive indices for crown glass are `mu_(R)=1.53` and `mu_(V)=1.55,` find the dispersive power of the flint glass