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Do many photons interfere with them selves or each other?

  1. Jul 17, 2010 #1
    Hello,

    If a beam of light is used in the double slit experiment instead of individual photons does each photon interfere only with itself in superposition or do the different photons interfere with each other? If detectors are used will the interference pattern still disappear?

    Thanks
     
  2. jcsd
  3. Jul 18, 2010 #2
    Consider a beam with such low intensity that photons pass one by one.Photons can't be 'interacting' with one another,yet the interference pattern persists. The interference is lost if detectors are used.
     
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