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How to measure an emission spectrum?

  1. Oct 1, 2005 #1
    Say I have a spectrophotometer that has a grating monochromator. If I want to measure emission instead of absorption from a lamp, could I just remove the exit slit? By removing the exit slit, doesn't all of the light just hit the sample?
  2. jcsd
  3. Oct 1, 2005 #2


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    what kind of detector are you using? If you're using a lamp (continuum or for instance sodium lamp) and you're just measuring the atomic emission spectra than you could probably use a single channel detector to scan the wavelengths without removing the exit slit. If you're using a multichannel detector, for instance a charge couple detector, than you'll need to open up the exit slit.
  4. Oct 1, 2005 #3
    Awesome, thanks!
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