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Position and momentum of particle in double slit experiment?

  1. Sep 7, 2015 #1


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    In the double slit experiment, what is the position and momentum of an electron/photon?
    Is the position of the electron/photon which slit it went through? And is the momentum of the electron/photon the wave like interference pattern detected on the detector screen?
  2. jcsd
  3. Sep 7, 2015 #2


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    Staff: Mentor

    The position is wherever it is first measured. If you have detectors in the slits, then they determine the position at one slit or the other; if not, the position is where the spot appears on the screen behind the barrier.

    The momentum is not measured at all in this experiment.
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