Question

The deviation produced for violet, yellow and red lights for crown glass are 3.75°, 3.25° and 2.86° respectively. Calculate the dispersive power of the crown glass.

Answer 1

Dispersive power, `omega = (δ_"v" - delta_r)/delta_y = (3.75^circ - 2.86^circ)/(3.25^circ) = 0.274^circ`