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If n is infinity, wavelength is equal to what?

  1. Nov 25, 2015 #1
    in the dispersion relation of the surface plasmon

    the wavelength is proportional to square root of n. according to equation 5 in this paper:
    https://newton.ex.ac.uk/research/emag/pubs/pdf/Barnes_JOA_2006.pdf
    if n goes to infinity, then what will be the value of wavelength.
    Thank you
     
  2. jcsd
  3. Nov 25, 2015 #2

    mfb

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    I don't see any n that could go to infinity in equation 5, and if you let one of the ε go to infinity (keeping the other constant) the square root has a finite limit.
     
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