Help me understand this A level Diffraction question I got wrong. Already know the correct answers a) 430 lines mm-1 & b) 7 -- however I would appreciate an expert to show step-by-step how to get there so I learn the relevant equation and methods. Thank you 2.Light of wavelength 600 nm is incident normally on a plane diffraction grating G. Using aspectrometer telescope, first order maxima are observed at A and B at angles of 86.67º and116.67º. (N.B. 60' = 1°)Jake86°40'B116°40'Calculatea) the number of lines per mm of the gratingb) the number of diffraction maxima seen (including the zero order)

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Answered: Light of wavelength 600 nm is incident…

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Light of wavelength 600 nm is incident normally on a plane diffraction grating G. Using a spectrometer telescope, first order maxima are observed at A and B at angles of 86.67° and 116.67°. (N.B. 60' = 1°)