1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Derive v = 2 l_nf_n for the nth harmonic

  1. Sep 9, 2012 #1
    1. The problem statement, all variables and given/known data
    Derive the expression v = lnfn where ln is the shortest distance between nodes for the nth harmonic.

    2. Relevant equations
    v = wave speed
    ln = shortest distance between nodes for the nthharmonic
    fn = frequency of the nth harmonic

    3. The attempt at a solution

    Is it asking me to take the derivative of the wave speed, which I believe would give me the acceleration of the wave?


    wave acceleration = 2*ln

    Am I making any sense?
  2. jcsd
  3. Sep 10, 2012 #2


    User Avatar
    Homework Helper

    nth harmonics of fo is n times fo. Similarly ln is equal to (lambda)o/2n.
    Now proceed.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Derive l_nf_n harmonic Date
Deriving Fermi-Dirac Distribution misunderstanding Wednesday at 11:10 AM
Deriving relativistic mass Wednesday at 10:38 AM
Optics: deriving Nodal and Principal Points for a thick lens Monday at 8:55 AM
Deriving Thick lens Equation Mar 10, 2018
Exponentially driven harmonic oscillator Mar 2, 2018