Question: A diffraction grating having 180 lines/mm is illuminated with a light signal containing only two wavelengths, 1 = 400 nm and 2 = 500 nm.

A diffraction grating having 180 lines/mm is illuminated with a light signal containing only two wavelengths, λ1 = 400 nm and λ2 = 500 nm. The signal is incident perpendicularly on the grating.

(a) What is the angular separation between the second-order maxima of these two wavelengths?

(b) What is the smallest angle at which two of the resulting maxima are superimposed?

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a Since d 100 mm180 00056 mm we write Eq 3625 as m 0 sin ... View full answer

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