A ray of light is incident at an angle of incidence, i, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. It the refractive index of the prism is$\mu$, the angle of incidence i, is nearly equal to

Question

( A ) $A\;\mu$
( B ) $\frac{A}{2\mu}$
( C ) $\frac{A}{\mu}$
( D ) $\frac{\mu A}{2}$