Question: A transparent diffraction grating has a period d = 1.50m. Find the angular dispersion D (in angular minutes per nanometres) corresponding to the maximum of

A transparent diffraction grating has a period d = 1.50μm. Find the angular dispersion D (in angular minutes per nanometres) corresponding to the maximum of highest order for a spectral line of wavelength λ = 530 nm of light falling on the grating
(a) At right angles;
(b) At the angle θo = 45° to the normal.

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