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Homework Help: The Wave Nature of Light

  1. Aug 22, 2014 #1
    Hi I am having a rough time with this questoin .
    1. The problem statement, all variables and given/known data
    Question: A student enters Best Buy prepared to buy a pair of speakers. Before he does so, he conducts an experiment with them. He places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices a quiet “spot”. If the speed of the sound in the room is known to be 350 m/s, calculate the possible frequencies being played by the speakers.

    2. Relevant equations
    PD = (n-1/2) λ

    3. The attempt at a solution
    f = v/(lambda) = 350/6(2n + 1) = 58.33/(2n+1) .... n belongs to integer
  2. jcsd
  3. Aug 22, 2014 #2


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    Staff: Mentor

    That denominator is not right. Try again. Take more care.
  4. Aug 23, 2014 #3
    PD = (n-1/2) λ ... PD = 0.3
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