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Probability of zero in stationary wave state

  1. Sep 22, 2006 #1
    What is it that causes the probability of stationary waves ( or waves in general) to be zero at a particular point? I mean, when i look at a stationary wave state there are places that there are zero probability of the particle being at with a particular energy, but i don't understand why there is zero probability there
  2. jcsd
  3. Sep 22, 2006 #2


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    I'm sure you're confusing the probability density with the probability itself. By "stationary waves" (in QM perhaps) do you mean "plane waves" ? They describe particles with definite energy & momentum.

  4. Sep 22, 2006 #3
    By stationary wave, I think he/she means stationary state: i.e. an energy eigenstate (which is, therefore, independent of time, assuming a time-independent Hamiltonian).
  5. Sep 23, 2006 #4

    Meir Achuz

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    Take a high speed photo of a vibrating string in its second harmonic.
    The center will never move.
  6. Sep 23, 2006 #5
    And as for the "what causes it..." part of the question, the answer is simple: boundary & continuity/smoothness conditions.
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