Question

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 1

Correct Answer - `0.038`
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`.