Two beam of red and violet colors are made to pass separately through a prism (angle of the prism is `60^(@)`). In the position of minimum deviation, the angle of refraction will be

Options

A. `30^(@)` for both the colours
B. Greater for the violet colour
C. Greater for the red colour
D. Equal but not `30^(@)` for both the colours

Answer

A

Explanation

In case of minimum deviation
angle of refraction (r ) = `(A)/(2) = 30^(@)`.