Physics - Geometrical Optics Question with Solution | TestHub

A thin prism ${\mathrm{P}}_1$ with angle $4^{\circ }$ and made from a glass of refractive index 1.54 is combined with another thin prism ${\mathrm{P}}_2$ made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of the prism ${\mathrm{P}}_2$ is :-