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Measuring Interference Experimentally

  1. Mar 24, 2010 #1
    Hi everyone,

    I'm currently working on a project, a part of which involves building a sagnac interferometer. My group understands the theory behind its operation, and we are now in the process of collecting materials needed to build it. We are, however, unsure of a way to quantitatively measure the phase difference between the two beams of light. One idea would be to project the interference pattern onto a screen and capture an image of it during rotation. We could then measure the interference spacings from the image after the experiment. Are there any devices or methods that would allow for a more precise measurement?

    Thanks in advance,
  2. jcsd
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