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I Fraunhofer Lines

  1. Mar 20, 2017 #1
    If you take an outdoor photo through a bandpass filter that only lets light through in a Fraunhofer line would it be completely dark, like night? Or would it have some daytime illumination?
     
  2. jcsd
  3. Mar 20, 2017 #2
    In theory it would be dark yes. However, what comes in at those lines is never entirely zero, and you will never have a filter that only exactly filters that line.
     
  4. Mar 21, 2017 #3
    OK, thanks. I also see that such narrow band filters are prohibitively expensive for the average experimenter.
     
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