Two beams of red and violet colours are made to pass separately through a prism (angle of the prism is $60^{\circ}$ ). In the position of minimum deviation, the angle of refraction will be
Select the correct option:
A
$30^{\circ}$ for both the colours
B
greater for the violet colour
C
greater for the red colour
D
equal but not $30^{\circ}$ for both the colours
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
At minimum deviation for any wavelength
$$
r_1=r_2=A / 2 \text {, Because } r_1+r_2=A
$$
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