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Wave propagation, +z or -z

  1. Apr 16, 2009 #1
    This is probably a silly question -- but I have been thinking about it, and I can't convince myself. So, I'd be greatly happy if you could solve my apparent "dilemma".

    In electromagnetics, for sinusoidal voltages, we use the phasor notation and express a
    positive travelling wave ( +Z direction)
    as follows:

    [tex]E_+ = A_0 e^{-i \beta z }[/tex]

    where as in quantum mechanics a positive travelling wave (+Z direction) is written as follows (correct me if I am wrong)

    [tex] \Psi_+ = A_0 e^{+i \beta z} [/tex]

    where beta's are wavenumbers.

    Where am I messing this up?
  2. jcsd
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