Absorbance is the measure of the quantity of light intensity absorbed by a sample solution.
What is absorbance?
Absorbance, denoted by A, is used to measure the amount of light intensity that is absorbed by a sample.
Absorbance is measured in a technique called spectrophotometry using a device called spectrophotometer. The spectrophotometer measures the intensity of light as photons of light passes through the sample.
The amount of that incident light that is absorbed by the sample is then displayed on the screen or output of the spectrophotometer.
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