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Statement of a problem № 3963

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Using the results of prob. (14.93) and the following table, estimate the fractional difference between the phase and group velocity in air at a wavelength of 5000 A Free space wavelength (A) (n-1) for air [4800 2.786x10^4, 5000 2.781x10^4, 5200 2.777 x10^4]

Solution:
Using the results of prob. (14.93) and the following table, estimate the fractio

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