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# A thin prism is made of a material having refractive indices

Question:

A thin prism is made of a material having refractive indices $1.61$ and $1.65$ for red and violet light. The dispersive power of the material is $0.07$. It is found that a beam of yellow light passing through the prism sufferes a minimum deviation of $4.0^{\circ}$ in favourable conditions. Calculate the angle of the prism.

Solution: