Red light of wavelength 625 nm is incident normally on an optical diffraction grating with 
lines/m. Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?
lines/m. Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?Question ID - 150149 | SaraNextGen Top Answer Red light of wavelength 625 nm is incident normally on an optical diffraction grating with lines/m. Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?
Red light of wavelength 625 nm is incident normally on an optical diffraction grating with lines/m. Including central principal maxima, how many maxima may be observed on a screen which is for from the grating?
1 Answer
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Answer Key / Explanation : (17) -
For principal maxima in grating spectra
Where, 
is the order of principal maxima and 
is the angle of diffraction.
Number of maxima 
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