what is the difference between absorbance and absorptance ?

Harold

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Jul 18, 2023
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What is the difference between absorbance and absorptance?
Please note that the IUPAC has defined the quantity "absorbance" as " Logarithm of the ratio of incident to transmitted radiant power through a sample". This is the point of the discussion and why "absorptance" is actually defined as the ratio of the incident to absorbed radiant power.May 26, 2017
 

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