Two beams of red and violet colours are made to pass separately through a prism of `A=60^(@)` In the minimum deviation position, the angle of refraction inside the prism will be

Options

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

Answer

D

Explanation

Here
Angle of prism, `A=60^(@)`
For minimum deviation
Angle of refraction, `r=(A)/(2)=(60^(@))/(2)=30^(@)` for both the colours