Physics - Geometrical Optics Question with Solution | TestHub

Three thin prisms are combined as shown in figure. The refractive indices of the crown glass for red, yellow and violet rays are${\mathrm{\mu }}_{\mathrm{r}},{\mathrm{\mu }}_{\mathrm{y}}$and${\mathrm{\mu }}_{\mathrm{v}}$respectively and those for the flint glass are${\mathrm{\mu }}_{\mathrm{r}}^{\mathrm{\prime }},{\mathrm{\mu }}_{\mathrm{y}}^{\mathrm{\prime }}$and${\mathrm{\mu }}_{\mathrm{v}}^{\mathrm{\prime }}$respectively. Find the ratio$\frac{\mathrm{A}\mathrm{\prime }}{\mathrm{A}}$for which, there is no net angular dispersion ($\mathrm{A}$and$\mathrm{A}\mathrm{\prime }$are respective deviations)