If the refractive index of material of a prism is `sqrt3`, then angle of minimum diviation of the prism, which is equilateral is

Options

A. `30^(@)`
B. `45^(@)`
C. `60^(@)`
D. `75^(@)`

Answer

C

Explanation

` n = (sin( (A+ delta_(m))/(2) ) )/(sin (A//2)) rArr sqrt(3) = ( sin ( (60 + delta_(m))/(2) ) )/(sin 30^(@)) `
`rArr delta_(m) = 60^(@)`.