The image formed by the objective of a compound microscope is

The refractive indices of the material of the prism and liquid are $1.56$ and $1.32$, respectively. What will be the value of $\theta$ for the above refraction?

The deviation angle produced by a thin glass prism when it is immersed in water is

[Angle of prism $=4{°}_{\alpha ,}{\mu }_g=1.5, {}_{\alpha }\mu _w=\frac{4}{3}$]