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Question about index of refraction

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  1. Jan 9, 2016 #1
    according to wikiedia i can express the index as n= √(εrμr)
    but i also know that the index of refraction depends of the wavelenght but i dont see any λ in the equation, so .... why?
     
    Last edited by a moderator: Jan 9, 2016
  2. jcsd
  3. Jan 9, 2016 #2

    Orodruin

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    The permeability and permittivity will generally depend on wavelength.
     
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