Question: A diffraction grating has 6.0 x 10-7m lines/m. Find the angular spread in the second-order spectrum between red light of wavelength 7.0 x 10-7 m

A diffraction grating has 6.0 x 10-7m lines/m. Find the angular spread in the second-order spectrum between red light of wavelength 7.0 x 10-7 m and blue light of wave length 4.5 x 10-7m.

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