13.1: Transmittance and Absorbance - Chemistry LibreTexts
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WEBSep 28, 2022 · This attenuation of radiation is described quantitatively by two separate, but related terms: transmittance and absorbance. As shown in Figure \(\PageIndex{1}a\), transmittance is the ratio of the source radiation’s power as it exits the sample, P T , to that incident on the sample, P 0 .
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