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Homework Help: A Very, Very Interesting Problem

  1. Mar 25, 2012 #1
    A diffraction grating has 150 "lines" per mm etched upon it. When light of wavelength 275 nm is normally incident upon the grating, how many bright spots appear on a screen a short distance away?:smile:
  2. jcsd
  3. Mar 25, 2012 #2


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    Please provide some attempt at the solution. We do not just provide answers here.
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