Question

Fill in the Blank : A monochromatic beam of light is incident at $60\°$ on one face of an equilateral prism of refractive index n and emerges from the opposite face making an angle $\theta(n)$ with the normal (see figure). For n =$\sqrt{3}$ the value of $\theta$ is $60\°$ and $d\theta/dn=m$. The value of m is . . . . . . .

Answer 1

b option is correct I think

Answer 2

OPTION B)....................