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

127 votes

For principal maxima in grating spectra

Where, is the order of principal maxima and is the angle of diffraction.

Number of maxima

127 votes

127