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Homework Help: Permitivity, and relative permitivity

  1. Apr 25, 2007 #1

    neu

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    1. The problem statement, all variables and given/known data

    For a plane em wave in vacuum can write [tex]k=\frac{w}{c}[/tex]

    what is the equivalent relation in a dielectric?

    2. Relevant equations

    [tex]\frac{1}{c^2}={\epsilon}{\mu}[/tex]


    3. The attempt at a solution

    [tex] k=\sqrt{{\epsilon_{r}}\epsilon\mu}.w[/tex]

    This right?
     
    Last edited: Apr 25, 2007
  2. jcsd
  3. Apr 25, 2007 #2

    Meir Achuz

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    Yes, but you could keep the c instead of epsilon0 and mu0.
     
  4. Apr 25, 2007 #3

    neu

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    ok so: [tex] \frac{1}{c}=\sqrt{\epsilon_{0}\mu_{0}}[/tex]

    so how is [tex]\epsilon[/tex] and [tex]\mu[/tex] related to c?

    is it [tex]\frac{n}{c}=\sqrt{\epsilon\mu}[/tex]?
     
  5. Apr 26, 2007 #4

    Meir Achuz

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    Yes, if you mean [tex]\epsilon=\epsilon_r\epsilon_0.[/tex]
     
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