A prism with refracting angle `60^@` gives angle of minimum deviation, `53^@, 51^@ and 52^@` for blue, yellow and red light respectively. What is the dispersive power of the prism ?

Answer

`0.038`

Explanation

Here, `A = 60^(@), delta_(b) = 53^(@), delta_(y) = 51^(@), delta_(r ) = 52^(@)`
Dispersive power,
`omega = (delta_(v) - delta_(r ))/(delta_(y)) = (53 - 51)/(52) = (1)/(26) = 0.038`