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Homework Help: A gas that absorbs light of wavelength 500 nm in the laboratory. Suppose there is a c

  1. Oct 4, 2012 #1
    1. The problem statement, all variables and given/known data
    a gas that absorbs light of wavelength 200 nm in the laboratory. Suppose there is a cold cloud of the same gas between you and a hot source of continuum (blackbody) radiation, and the cloud is moving away from Earth. You will see a spectrum with


    2. Relevant equations



    3. The attempt at a solution
    absorption line at a wavelength longer then 200nm. since the cold cloud is moving away so would have a red shift right?
     
  2. jcsd
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