A ray is incident at an angle of incidence i on one surface of a prism of small angle A and emerges normally from the opposite surface. If the refractive index of the material of the prism is $\mathrm{\mu }$, the angle of incidence i is nearly equal to

• A

  $\frac{\mathrm{A}}{\mathrm{\mu }}$

• B

  $\frac{\mathrm{A}}{2\mathrm{\mu }}$

• C

  $\mathrm{\mu A}$

• D

  $\frac{{\displaystyle \mathrm{\mu A}}}{2}$