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The pattern is not just both slits?

  1. Jun 22, 2011 #1
    the interference pattern is not just due to photon passing through both slits?

    i read that the interference pattern is such that it is superposition of not just both slits but:

    1. both slits and 2. neither slit?

    what would be the effect of neither slit? as if it passed through the middle of both slits? or did not pass at all?
    Last edited: Jun 22, 2011
  2. jcsd
  3. Jun 22, 2011 #2
    Well, a particle that went through neither slit would not have an effect on the interference pattern, but what you read was probably explaining that, mathematically, the superposition of states corresponding to a double slit experiment is such that you have a superposition of quantum states, where a few outcomes can be considered simultaneously: 1) The particle goes through the right slit 2) The particle goes through the left slit and 3) the particle goes through neither slit.

    While the interference pattern you see is a direct consequence of 1 and 2, Quantum Mechanics, along with the information contained in the particle's wavefunction, tells us that 3 is also happening, it just doesn't have any impact on the actual interference pattern.
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