a quantum question

Discussion in 'Physics' started by logicman112, Oct 16, 2010.

  1. logicman112

    Thread Starter Active Member

    Dec 27, 2008
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    My question is about a quantum particle trapped in a box. The physic books say that the particle may have some quantum wavelengths, a multiple of the length of the box and some sinus curves are depicted with different wavelengths.
    How that particle can move between the walls of the box while wave function is zero at some places means the particle is impossible to be there.
    Is there anybody interested in the basic concepts of modern physic? I have a book by Arthur Beiser and we can study it simultaneously and then discuss the concepts.
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    Define quantum particle. By itself, without real context, the phrase has no meaning.
     
  3. Papabravo

    Expert

    Feb 24, 2006
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    That would be fine for the standing wave, but the wave function may have a traveling wave component that depends on time. When the two are combined it is hard to imagine the locus of zero probability.
     
  4. logicman112

    Thread Starter Active Member

    Dec 27, 2008
    69
    2
    http://abyss.uoregon.edu/~js/21st_century_science/lectures/lec14.html says:
    ...the position and the velocity of an object cannot both be measured exactly, at the same time, even in theory. The very concepts of exact position and exact velocity together, in fact, have no meaning in nature.
    ----------------------------------------------------------------------------------
    Why we can not measure position and velocity exactly?
     
  5. Papabravo

    Expert

    Feb 24, 2006
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    To say nothing of the tunneling probability from inside a potential well.
     
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