1) A prism has a refracting angle of 60°. When placed in the position of minimum deviation, it produces a deviation of 30°. The angle of incidence is A) 30° B) 45° C) 15° D) 60° Answer: Option BExplanation:$i = \frac{A+\delta_{m}}{2}$ = $\frac{60+30}{2}$ = 45°
