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Wavelength in QM

  1. Sep 22, 2009 #1
    Can anyone tell me how is wavelength defined for a wave associated with a particle?
    If the wave function we are speaking of has no physical significance,then how can measure its length?
    tks for any rpl
  2. jcsd
  3. Sep 22, 2009 #2
    By "wavelength" in QM one usually means the de Broglie wavelength, defined by
    where p is the momentum of a particle and h is planck's constant.

    The wavefunction is neither physically insignificant nor something you measure directly. For a basic introduction to what the wavefunction means, see the library article on wave-particle duality; for a more technical description see that on wave function.
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