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Direction of Poynting vector

  1. Oct 7, 2012 #1
    I have a question: when the poynting vector and energy propagation in electromagnetic waves are in the same direction and when are in different direction?
     
  2. jcsd
  3. Oct 7, 2012 #2

    mfb

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    Staff: Mentor

    The Poynting vector is the direction of energy flow, I don't see how it could point in the opposite direction. Maybe metamaterials have some strange properties here.
     
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