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Homework Help: Electromagnetics - finding wavelength from e_r and f

  1. Aug 27, 2014 #1
    1. The problem statement, all variables and given/known data

    A transmission line is 1 meter and has a relative dielectric constant of 2.25
    Find the phase velocity u and the wavelength λ for a frequency of 50 MHz.

    2. Relevant equations

    λ=???(ε_r, f)

    3. The attempt at a solution

    I am unable to get from the relative dielectric constant and frequency to the wavelength. I could not find any such equation in my text.

    My guess is the transmission line datum is extraneous, but I could be wrong.
  2. jcsd
  3. Aug 27, 2014 #2


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    Staff: Mentor

  4. Aug 28, 2014 #3

    rude man

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    Thne length is immaterial, don't know why it's included.

    To answer the question, what is the simple relationship between relative dielectric constant and the phase velocity? It applies to the transmission line and also to light. For light, think n for a hint.
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