Question

Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is ${60}^{\circ }$.

• A. True
• B. False

Answer 1

The correct option is A True

$A={\delta }_m={60}^{\circ }$
At minimum deviation $i=\left(\frac{A+{\delta }_m}{2}\right)={60}^{\circ }$