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Production of inteference

  1. Mar 8, 2015 #1
    What is the production when two beams interference? 2 beams meet, and is there only one left after interference? Like vector.
  2. jcsd
  3. Mar 9, 2015 #2
    The two beams "meet" and produce a phase related fringing pattern on a sensor. The beams are continuous. Movement of the device containing the beams causes a Doppler effect along the plane of the beams causing a shifting of the fringe pattern that can be counted and calculated to provide information about the amount and direction of rotation.
  4. Mar 15, 2015 #3


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    If the beams cross each others path in free space, they emerge afterwards unchanged. If a sensor, such as an E-field sensor, is placed in the volume where they overlap, it will read the vector sum at any instant.
  5. Mar 15, 2015 #4


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    This question is a bit too vague for a good answer. Are your two beams originating from the same source (a splitter) or from independent sources? The two beams need to be coherent for a stationary interference pattern to form.
    It is not possible for the two beams to become just one, from interference.
  6. Mar 16, 2015 #5
    A split beam from a single source reflected around separate paths are the two counter-rotating beams that are channeled to a photo detector. If the device that contains them is not rotating, the beams remain in phase. If rotation is occurring, one beam continuously changes phase with respect to the other and the moving interference pattern in the photo detector can be converted into digital pulses, each pulse representing an angle of rotation. The rate at which the pulses are produced is also a measure of the rate of rotation. Due to the nature of the mirrors the beams continue along their paths.
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