How many maxima are there in the full diffraction pattern

Reference no: EM13273099

A diffraction grating is made up of slits of width 420 nm with separation 1300 nm. The grating is illuminated by monochromatic plane waves of wavelength ? = 790 nm at normal incidence.

(a) How many maxima are there in the full diffraction pattern?

(b) What is the angular width of a spectral line observed in the first order if the grating has 1000 slits?

Reference no: EM13273099

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