Beer-Lambert Law
Version 1.0.0 · Updated 2026-07-28
CORE DEFINITION
The Beer-Lambert law, also known as Beer's law, the Lambert-Beer law, or the Bouguer-Lambert-Beer law, is a fundamental law of light absorption. It applies to all electromagnetic radiation and all light-absorbing substances, including gases, solids, liquids, molecules, atoms, and ions. The Beer-Lambert law is the quantitative basis for absorptiometry, colorimetric analysis, and photoelectric colorimetry.
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The Beer-Lambert law, also known as Beer's law, the Lambert-Beer law, or the Bouguer-Lambert-Beer law, is a fundamental law of light absorption. It applies to all electromagnetic radiation and all light-absorbing substances, including gases, solids, liquids, molecules, atoms, and ions. The Beer-Lambert law is the quantitative basis for absorptiometry, colorimetric analysis, and photoelectric colorimetry.
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The Beer-Lambert law states that the absorbance of a solution is directly proportional to the concentration of the absorbing species and the path length (A = εlc). The mechanism is that the extent of light absorption increases linearly with concentration and thickness.
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- zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%AF%94%E5%B0%94-%E6%9C%97%E4%BC%AF%E5%AE%9A%E5%BE%8Bverified
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