Physics - Geometrical Optics Question with Solution | TestHub

The angle of deviation produced by a thin prism when placed in air is ' ${\delta }_1$ ' and that when immersed in water is ' ${\delta }_2$ '. The refractive index of glass and water are $\frac{3}{2}$ and $\frac{4}{3}$ respectively. The ratio ${\delta }_1:{\delta }_2$ is