cse • paper_1 • waves_oscillations
[UPSC CSE 1993] Waves (Q92, 20M)
The refractive indices of material of wavelength 5090\text{ \AA}, 5340\text{ \AA} and 5890\text{ \AA} are equal to 1.64, 1.640 and 1.630 respectively. Estimate the phase group velocities of light near \lambda = 5340\text{ \AA}.
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