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Homework Help: How does a light gate work?

  1. Dec 20, 2014 #1
    I'm looking for an explanation for my physics investigation

    thanks in advance ;D
  2. jcsd
  3. Dec 20, 2014 #2


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    Gold Member

    Uh ... WHAT investigation? Have you done ANY research? I did a quick Google and got some decent explanations.
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