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5 April, 00:53

A parallel beam of light of wavelength 450nm is incident normally on a diffraction grating which has 300lines/mm What is the total number of intensity maxima observed?

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  1. 5 April, 02:24
    That will be 450 plus 300 equals 750 for an answer

    I'm not sure is

    F is right but I didn't my best
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