The refractive indices of flint glass for red and violet lights are 1.613 and 1.632, respectively. Find the angular dispersion produced by a thin prism of flint glass having refracting angle `5^@`.

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)xx5^(@)`
`=0.095^(@)`