A horizontal incident beam consisting of white light passes through an equilater

Question

A horizontal incident beam consisting of white light passes through an equilateral prism, like the one shown in the figure

What is the dispersion (?v??r) of the outgoing beam if the prism's index of refraction is nv = 1.510 for violet light and nr = 1.428 for red light?

A horizontal incident beam consisting of white light passes through an equilateral prism, like the one shown in the figure What is the dispersion (?v??r) of the outgoing beam if the prism's index of refraction is nv = 1.510 for violet light and nr = 1.428 for red light?

Explanation / Answer

theta_v = (nv - 1)*A = (1.51 - 1)*60 = 30.6 degrees

theta_r = (nr - 1)*A = (1.428 - 1)*60 = 35.68 degrees


theta_v - theta_r = 4.92 degrees

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