Three thin prisms are combined as shown in figure. The refractive indices of the crown glass for red & violet rays are $μ_{r}$ and $μ_{v}$ respectively & those for the flint glass are $μ_{r}^{'}$ and $μ_{v}^{'}$ respectively. The ratio $\frac{A ^{'}}{A}$ for which there is no net angular dispersion

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Net angular dispersion θ T ​ = 2 A ( μ v ​ − μ r ​ ) − A ′ ( μ v ′ ​ − μ r ′ ​ ) = 0 A A ′ ​ = μ v ′ ​ − μ r ′ ​ 2 ( μ v ​ − μ r ​ ) ​

Physics - Geometrical Optics Question with Solution | TestHub

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