If the angle of minimum deviation is same as the angle of incidence at minimum deviation for an equi

Question

If the angle of minimum deviation is same as the angle of incidence at minimum deviation for an equilateral prism then its refractive index is\

Professor PC Thomas Classes · Answer

$\mathrm{D}=2 \mathrm{i}-\mathrm{A} \mathrm{A}=60$\ $	herefore \mathrm{D}=2 \mathrm{D}-\mathrm{A} \quad \mathrm{i}=\mathrm{D}$\ $\mathrm{A}=\mathrm{D}=60$\ $\mathrm{n}=\frac{\sin \left(\frac{A+D}{2}ight)}{\sin \left(\frac{A}{2}ight)}=\frac{\sin 60}{\sin 30}=$\