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Energy conservation and michelson interferometers

  1. Oct 25, 2015 #1
    What happens to the energy of a laser beam when it completely deconstructively interferes with itself in a michelson interferometer?
  2. jcsd
  3. Oct 25, 2015 #2


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    The missing energy goes back to the source. It can be understood from the phase shift attained upon reflection in the beam splitter.
  4. Oct 25, 2015 #3
    Within an interferometer, photon interference causes changes in detect-ability. Collisions between photons do not change energy, except when high-energy photons create matter.
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