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

• A

  $\frac{2A}{\mu }$
• Correct answer
  B

  $\mu A$
• C

  $\frac{\mu A}{2}$
• D

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

Hence, the correct answer is option: 'B'.