Calculate the angle of a prism of dispersive power `0.021` and refractive index `1.53` to
Channel: Doubtnut
Date: 2020-08-02

Calculate the angle of a prism of dispersive power `0.021` and refractive index `1.53` to form an achromatic combination with prism of angle `4.2^@`, and dispersive power `0.045`, having refractive index `1.65`. Find also the net deviation.