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Homework Help: Wavelength of the wave which is produced at the wire

  1. Mar 23, 2010 #1
    1. The problem statement, all variables and given/known data

    The diagram attached shows a metal wire stretched between two supports P and T which are 4x apart where PQ=QR=RS=ST=x . Three small pieces of paper are placed at positions Q , R and S . When the wire is vibrated at a certain frequency , the small piece of paper at R remains on the wire but the small pieces of paper at Q and S drop off . What is the wavelength of the wave which is produced at the wire .

    2. Relevant equations

    3. The attempt at a solution

    what can i infer if that paper doesn't drop , does it have anything to do with the nodes and antinodes of the standing wave ?
  2. jcsd
  3. Mar 23, 2010 #2


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    Homework Helper

    Re: wavelength

    P, R and T are nodes. Q and S are antipodes.
    Length between the two successive nodes or antinodes is equal to λ/2.
  4. Mar 23, 2010 #3
    Re: wavelength

    thanks !
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