A diffraction grating has 400 lines per mm and is illuminated normally by monochromatic light of wavelength 600nm. Calculate: the grating spacing the angle to the normal at which the first principal order is seen the number of diffraction maxima obtained the slit width

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A diffraction grating has 400 lines per mm and is illuminated normally by monochromatic light of wavelength 600nm. Calculate:

  • the grating spacing
  • the angle to the normal at which the first principal order is seen
  • the number of diffraction maxima obtained
  • the slit width

 

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