The refractive indices of flint glass for red and violet light are 1.613 and 1.632, respectively. Find the angular dispersion produced by the thin prism of flint glass having refracting angle `4^(@)`.

Explanation

Deviation of the red light is `delta_(r) = (mu_(r) - 1)A` and deviation of the violet light is `delta_(V) = (mu_(V) - 1)A`. The dispersion `= delta_(V) = delta_(r) = (mu_(V) - mu_(r)) A = (1.632 - 1.613)xx 5^(@) = 0.095^(@)`