1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: Spherical Wave - What is the phase?

  1. Nov 1, 2007 #1
    1. The problem statement, all variables and given/known data

    A spherical wave with a wavelength of 2.0 m is emitted from the origin. At one instant of time, the phase at r=4.0m is pi radians. At that instant, what is the phase at r=3.5m?

    2. Relevant equations


    3. The attempt at a solution

    (kr-wt+(phi))=phase constant
    D(x,y,z)=displacement, or here, radius
    A cancels and doesn't matter.
    x=3.5(pi)/4 <---- which is wrong.

    So then I tried subtracting the equations...
    .5=Asinx <---- Then I didn't know what to do with it. Help please?
    Last edited: Nov 1, 2007
  2. jcsd
  3. Nov 1, 2007 #2
    Nevermind . . .
  4. Feb 19, 2008 #3
    I'd sure like to know.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook