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Classifying standing waves and their frequencies

  1. Jul 26, 2015 #1
    1. The problem statement, all variables and given/known data
    40-cm long string, with one end clamped and the other free to move transversely, is vibrating in its fundamental standing wave mode. If the wave speed is 320 cm/s, the frequency is

    • A

      16 Hz

    • B

      8 Hz

    • C

      32 Hz

    • correct-icon.png


      2 Hz

    • wrong-icon.png
      4 Hz

    2. Relevant equations
    f = v/2L
    because its fundamental
    3. The attempt at a solution
    I thought all one had to do was (320)/2(40) = 4Hz, but the answer is 2Hz. I dont understand why
  2. jcsd
  3. Jul 26, 2015 #2


    User Avatar
    Homework Helper

    The wavelength is not 2L.
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