Definition
noun
(spectrophotometry)
The measure of how strongly a substance absorbs light at a particular wavelength, and is usually represented by the unit M-1cm-1 or L mol-1cm-1.
Supplement
It is symbolized by ε in Beer-Lambert law, A = εcl, where A is the absorbance of the sample, l is the pathlength (usually in centimeter), and c is the concentration of the of absorbing species in the material (moles per liter).
Synonym: molar absorptivity, molar absorption coefficient, absorbancy index, absorptivity, molar absorbancy index.
See also: spectrophotometer, absorbance.
Dictionary > Molar extinction coefficient
You will also like...
![temperature - abiotic factor](https://www.biologyonline.com/wp-content/uploads/2020/02/Abiotic-and-Biotic-Factors-224x168.jpg)
Abiotic and Biotic Factors
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..
![Bryophytes](https://www.biologyonline.com/wp-content/uploads/2020/02/Bryophytes-252x168.jpg)
Bryophytes
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
![The Human Physiology](https://www.biologyonline.com/wp-content/uploads/2020/02/The-Human-Physiology-300x168.jpg)
The Human Physiology
Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..
![Schematic diagram of bacterial lactose operon](https://www.biologyonline.com/wp-content/uploads/2020/02/Gene-Action-Operon-Hypothesis-217x168.jpg)
Gene Action – Operon Hypothesis
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
..
![DNA carries genes coding for proteins](https://www.biologyonline.com/wp-content/uploads/2020/02/Genetic-information-and-protein-synthesis-224x168.jpg)
Genetic Information and Protein Synthesis
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..
![Evolution of Life - Ancient Earth](https://www.biologyonline.com/wp-content/uploads/2020/02/Evolution-of-Life-Ancient-Earth-300x168.jpg)
Evolution of Life – Ancient Earth
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..