Question

Prism angle of a prism is `10^(@)` ,Their refractive index for red & violet color is `1.51 & 1.52` respectively .Then dispersive power will be
`(1) 0.5, (2)0.15, (3)0.019,(4) 0.032`

Answer 1

Dispersive power of prism `delta = ((mu_(v) - mu_(r))/(mu_(y) - 1)) "but" mu_(y)= (mu_(v)+ mu_(r))/(2) = (1.664-1.644)/(1.654-1)= 0.0305`