Question: Minimum deviation suffered by red, yellow and violet beams passing through an equilateral transparen...

Question

Minimum deviation suffered by red, yellow and violet beams passing through an equilateral transparent prism are 38.4⁰, 38.7⁰ and 39.2⁰ respectively. Calculate the dispersive power of the medium.

Answer 1

Solution

$\omega = \frac { \delta _ { \mathrm { V } } - \delta _ { \mathrm { R } } } { \delta _ { \mathrm { Y } } } = \frac { 39.2 ^ { \circ } - 38.4 ^ { \circ } } { 38.7 ^ { \circ } } = 0.0206$