A physics instructor wants to project a spectrum of visible-light colors from 400 nm to 700 nm as partof a classroom demonstration. She shines a beam of white light through a diffraction grating that has500 lines per mm, projecting a pattern on a screen 1.9 m behind the grating.Part AHow wide is the spectrum that corresponds to m = 1?Express your answer with the appropriate units.W₁ = .49SubmitPart B.mPrevinue Aneware Remiect AnswerHow much distance separates the end of the m= 1 spectrum and the start of the m = 2 spectrum?Express your answer with the appropriate units.Ay/21 - ValueUnits

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