1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar

    Staff: Mentor

  4. Aug 28, 2014 #3

    rude man

    User Avatar
    Homework Helper
    Gold Member

    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted