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A Relation between the absorption coefficient and the transmittance spectrum

  1. Apr 12, 2016 #1
    hi every one
    can you tell me how to calculate the absorption coefficient of a thin film using the absorption and the transmittance spectrum plotted as a function of the wavelength (knowing that i don't know the thickness of the film )
     
  2. jcsd
  3. Apr 12, 2016 #2

    mathman

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    Science Advisor

    Since you don't know the thickness your question can't be answered. To first order the absorption is a product of the coefficient and the thickness.
     
  4. Apr 18, 2016 #3
    thank you i really appreciate your help
     
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