When white light is passed through a prism, which colour shows the minimum deviation?

$A$ thin hollow prism of refracting angle $3^{\circ}$,filled with water,gives a deviation of $1^{\circ}$. The refractive index of water is

Minimum deviation is observed with a prism having angle of prism $A$,angle of deviation $\delta$,angle of incidence $i$,and angle of emergence $e$. We then have generally

$A$ light ray is incident on a prism of angle $A = 60^{\circ}$ and refractive index $\mu = \sqrt{2}$. The angle of incidence at which the emergent ray grazes the surface is given by:

If the angle of minimum deviation produced by an equilateral prism is equal to the angle of the prism,then the refractive index of the material of the prism is nearly

$A$ ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to $\frac{3}{4}$ of the angle of the prism. The angle of deviation is (in $^{\circ}$)