Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Two definitions of wave reflection coefficient

  1. Jul 31, 2011 #1
    The waves book by A.P.French gives two characterizations of the reflection coefficient for a 1-D travelling wave encountering an interface between two media. On one hand, he writes
    [tex] R = \frac{v_2 - v_1}{v_2 + v_1} [/tex]
    where [itex]v_i[/itex] are the wave speeds in the two media. Later on, he writes the reflection coefficient in terms of mechanical impedance:
    [tex] R = \frac{Z_1 - Z_2}{Z_1 + Z_2}[/tex]
    where [itex]Z_i[/itex] denote the mechanical impedances for the media. My question is: are these two definitions always consistent? I two media have the same wave speed, do they automatically have the same impedance?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted