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Difference between Group and phase velocity

  1. Feb 4, 2016 #1
    Hi! I am having problem in understanding the difference between phase and group velocity clearly. In my textbook phase velocity is given by ω/κ while group velocity is by dω/dκ. What is the difference between these two terms?
    Thank you!
  2. jcsd
  3. Feb 4, 2016 #2


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    There are some interesting animations on this subject:

  4. Feb 5, 2016 #3
    thanks I have got it
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