1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Conservation of energy in standing wave

  1. Feb 16, 2013 #1
    1. The problem statement, all variables and given/known data
    A standing wave is produced by small transverse oscillations of one end of a taught string stretched between an oscillator and a fixed point. The frequency of oscillation is adjusted to be resonant at the third harmonic.

    The amplitude of the string's viabration is very much greater than that of the oscillator.
    (i) Does this violate the principle of conservation of energy?
    (ii) Explain why

    3. The attempt at a solution
    I do not believe this would violate the conservation of energy.

    I think that if a standing wave is formed the addition (via superposition) of the displacements of points on the new and reflected waves should be more than that of the oscillator.

    Does that sound like a valid explanation???
     
  2. jcsd
  3. Feb 16, 2013 #2

    collinsmark

    User Avatar
    Homework Helper
    Gold Member

    'Sounds like a fair explanation to me. :approve: (Edit: As a matter of fact, that's about the most concise explanation I can think of. I'd give you full credit.)

    But just for good measure, here are a couple of links on resonance, for further research.
    http://hyperphysics.phy-astr.gsu.edu/hbase/sound/reson.html
    http://en.wikipedia.org/wiki/Resonance
     
    Last edited: Feb 16, 2013
  4. Feb 17, 2013 #3
    I also asked my lecturer and he said it sounded ok, thanks for your reply :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Conservation of energy in standing wave
Loading...