The deviations produced for violet, yellow and red lights in case of flint glass prism are `3.32^(@), 3.27^(@)` and `3.22^(@)` respectively. Calculate dispersive power of flint glass.

Answer

`0.0306`

Explanation

`delta_v = 3.32^@, delta_y = 3.27^@, delta_r = 3.22^@`
Dispersive power `= (delta_v - delta_r)/(delta_y)`
=`(3.32^@ - 3.22^@)/(3.27^@) = (0.1)/(3.27) = 0.0306`.