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`