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Negative absorbance reaading

  1. Jul 10, 2010 #1
    hi

    i know this is kind of a basic question..but what in reality does a negative absorbance reading means?? why cant the spectrometer just say its out the reading range or something??
    does a negative reading really say something can we look at it and detect something...like if the negative reading is x that means it has so much of some component...
     
  2. jcsd
  3. Jul 10, 2010 #2
    This sounds like a question for the spectrometer's manual perhaps...?
     
  4. Jul 10, 2010 #3
    that means your measurement is not well calibrated. a negative absorption from an excited sample would indicate stimulated emission
     
  5. Jul 10, 2010 #4
    It seems like the spectrometer needs to be calibrated. It's like pushing the zero or tare on a balance. You manually set which point is called zero and the device reads other values with respect to that.
     
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