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Forward and backward waves

  1. Feb 13, 2009 #1
    Hi all;
    In a reflection and transmission problem of light off a dielectric slab or Fabry-Perot resonator, is it necessary to describe the wave in the slab as a sum of forward and backward wave or just a forward wave propagate in the relevant direction is enough. ?
    knowing that in the above medium, the wave in the medium of incidence is Ei +Er with Er = rEi and the field medium of transmittance is Et = tEi

    In this case, is there any difference between oblique and normal incidence.

    any insight is very much appreciated
    Last edited: Feb 13, 2009
  2. jcsd
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