A prism has a refracting angle of $60^{\circ}$. When a ray is incident at $50^{\circ}$, it suffers m

Question

A prism has a refracting angle of $60^{\circ}$. When a ray is incident at $50^{\circ}$, it suffers minimum deviation, the angle of minimum deviation must be\

Professor PC Thomas Classes · Answer

$\mathrm{D}=2 \mathrm{i}-\mathrm{A}$ Substitute & get D.\