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Physical significance of wavenumber

  1. Aug 5, 2010 #1
    i do not understand what is the physical significance of wavenumber.
    i have a plot with wavenumber on x axis and count on the y axis.
    what does the plot mean, how can i relate to a practical example. please help
  2. jcsd
  3. Aug 5, 2010 #2
    Re: wavenumber

    Wavenumber is related to wavelength by


    Maybe you are counting the number of photons of a certain wavelength that reach a detector?
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