Задача 00046.

Using the condition of problem 214, determine the relationship between the average phase and average group velocities in the interval (lambda2 - lambda1). Condition 214: the refractive indices of carbon disulfide for light with wavelengths lambda1 = 509 nm and lambda2 = 534 nm are n1 = 1.647 and n2 = 1.64.

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