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Homework Help: Expected angle

  1. Apr 29, 2009 #1
    1. The problem statement, all variables and given/known data

    A grating has exactly 7000 lines uniformly spaced over 2.67 cm and is illuminated by light from a mercury vapor discharge lamp. What is the expected angle for the third-order maximum of the green line ( = 546 nm)?

    2. Relevant equations


    3. The attempt at a solution

    no idea :(
  2. jcsd
  3. Apr 30, 2009 #2


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    Homework Helper

    Try to find out the relevant equation for diffraction grating.
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