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Path differences for constructive and destructive interference

  1. Apr 20, 2014 #1
    please,I have exams on Tuesday and I need someone to solve this question for me
    so that I will pass my exams.
    Your helps will be kindly appreciated.
  2. jcsd
  3. Apr 20, 2014 #2


    User Avatar
    Science Advisor
    Gold Member

    What question? ...
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