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I Traveling EM waves with fixed energy density

  1. May 15, 2016 #1
    I'm taking an undergrad course in Electromagnetism and Optics, and in the lecture notes it reads:
    "Consider the formal equation ε0D⋅E = 1 ... that must be obeyed for waves travelling in different directions as defined by the wave vector k but with a given energy density."
    Could anyone help me as to where this equation comes from?
  2. jcsd
  3. May 20, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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