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Homework Help: Simple question in Del operator on plane wave equation

  1. Oct 11, 2014 #1
    Hello
    question is:
    As you see when we do del operator on A vector filed in below example it removes exponential form at the end.why does it remove exponential form finally?
    7575182400_1413042051.jpg
     
  2. jcsd
  3. Oct 11, 2014 #2

    vela

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    It doesn't. The exponential is part of ##\vec{A}##.
     
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