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Combining light beams question

  1. Jul 21, 2012 #1

    jimgraber

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    When you combine two light beams with a half-silvered mirror, do you get a mixture or a superposition?
     
  2. jcsd
  3. Jul 21, 2012 #2

    Bill_K

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    It depends on how the two light beams were generated. If they're coming from two separate sources, it's a mixture. To get a superposition, the incoming beams have to be coherent to begin with.
     
  4. Jul 21, 2012 #3

    jimgraber

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    Thanks, Bill.
    Is there any other way to get a superposition of independent beams?
    TIA. Jim Graber
     
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