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Homework Help: Wavelength of sound affected by the moving observer?

  1. Jul 20, 2014 #1
    1. The problem statement, all variables and given/known data

    why the wavelength of sound is affected by the moving observer? because as the observer move, the sound source is still stationary . so in my opinion it's not affected by the moving observer. the ans is C for this question. i cant understand.

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Jul 20, 2014 #2


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    Homework Helper

    The source is still "stationary" but you could easily change your perspective so that you are "stationary" and then the source would be moving.

    In other words, it is only relative velocity that is important (because one frame of reference is not better than the other)
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