Dictionary > Molar absorptivity

Molar absorptivity

(1) A measure of how strongly a chemical species absorbs light at a particular wavelength. It is often expressed in units of cm-1M-1.
(2) A fundamental unit in spectrophotometry.
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).
Symbol: ε

See also: Beer-Lambert law

You will also like...

Peppered moth ("Biston betularia") melanic and light form
Examples of Natural Selection

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..


This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..

human respiratory system

The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

Water Cycle
The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

Homeostasis by water regulation
Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Biological Energy
ATP & ADP – Biological Energy

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..