Q
QuestionChemistry

What units is absorbance measured in?
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Answer

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Step 1
: Understanding Absorbance

Absorbance is a dimensionless quantity, which means it has no units. It is a measure of the amount of light absorbed by a sample at a specific wavelength.

Step 2
: Definition of Absorbance

- $$I$$ is the intensity of transmitted light
Absorbance (A) is defined by the Beer-Lambert Law as: Where:

Final Answer

It is a logarithmic ratio of light intensities, which cancels out any units during the calculation.