Question

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 `5^@`.

Answer 1

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^(@)`