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How to get beat frequency from graph

  1. Feb 6, 2012 #1
    1. The problem statement, all variables and given/known data

    how do you get the beat frequency from the beat envelope of two intersecting waves as in the attachment

    2. Relevant equations

    fb=f1-f2

    3. The attempt at a solution
    i thought maybe to get the frequency of the actual wave but dont think thats right
     

    Attached Files:

  2. jcsd
  3. Feb 6, 2012 #2
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