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Homework Help: Travelling waves equation

  1. Jun 9, 2012 #1
    (a) The displacements of two travelling waves are given by:

    D1(x,t) = A sin[kx +ωt +φ]


    D2 (x,t) = A sin[kx −ωt +φ] where A=0.01m, k=5rad.m−1,ω=200rad.s−1 andφ=π3rad

    (i) Use the appropriate trigonometric identity to find the displacement resulting from the superposition of these two waves.

    (ii) Is the wave resulting from this superposition a travelling wave? Briefly explain your answer.

    (iii) Find a value for the separation between adjacent maxima (antinodes) in the resultant wave.

    thanks guys
  2. jcsd
  3. Jun 13, 2012 #2


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    Homework Helper

    you've got to try it for yourself first. read through the first question, and think of what they are asking you to do.
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