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Mach-Zehnder Interferometer at Wiki Question

  1. Jul 16, 2008 #1
    Can anyone help out?

    I was reading about MZ interferometers on Wikipedia


    In the wiki article they have a picture of 4 samples of photon paths in a MZ interferometer. They indicate the probability of a finding a photon at detectors (A,B,C) for 3 of the diagrams but the fourth they leave you guessing. I am really bugged. I can't find the answer anywhere. What is the probability of detecting a photon at detector A in the bottom right diagram. I am thinking it must be 50%?
  2. jcsd
  3. Jul 18, 2008 #2
    where is the question? i think you misunderstood the article.
    the top-left and bottom-left pictures represent the same apparatus, as well as the top-right and bottom-right.
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