Sourav PanApril 24, 2025

What is the unit of absorbance in Beer-Lambert Law?

Sourav PanApril 24, 2025

Answered

Absorbance (A) in the Beer-Lambert Law is a dimensionless quantity and does not have any units. It represents the logarithmic ratio of the intensity of incident light to the intensity of transmitted light and is often measured on a scale from 0 to 2, where absorbance of 1 indicates that 90% of the light has been absorbed. Absorbance is calculated from the intensity values and thus has no units.

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