An achromatic convergent lens of focal length `150 cm` is made by combining
Channel: Doubtnut
Date: 2020-07-05

An achromatic convergent lens of focal length `150 cm` is made by combining flint and crown glass lenses. Calculate the focal length of both the lenses and point out which one is divergent if the ratio of the dispersive power of flint and crown glasses is `3:2.`