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

Homework Help: Phase velocity and wave propagation velocity

  1. Aug 28, 2008 #1

    morrobay

    User Avatar
    Gold Member

    1. The problem statement, all variables and given/known data
    wavelength = 3m
    frequency =25 cycles/sec
    period T = 1/frequency = .04 sec/cycle
    wave propagation velocity =75 m/s
    wave number K = 2pi/wavelength= 2.09 radians/m
    angular frequency w = 2pi/T = 157 radians/s
    phase velocity Vp = w/k = 157/2.09 = 75meters/second

    ----------------------------------------------------------------x = 200 meters, t= 2.66 s

    In the above propagation velocity = phase velocity.

    What would vary here for phase velocity to be greater than propagation velocity ?
    ]
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  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