Beer-Lambert law(redirected from Absorbtivity)
Beer-Lam·bert law(bēr lam'bert),
the absorbance of light is directly proportional to the thickness of the media through which the light is being transmitted multiplied by the concentration of absorbing chromophore; that is, A = εbc where A is the absorbance, ε is the molar extinction coefficient, b is the thickness of the solution, and c is the concentration.
[August Beer, Johann Heinrich Lambert]
Beer’s lawA law stating that the concentration of an analyte is directly proportional to the amount of light absorbed, or inversely proportional to the logarithm of the transmitted light.
A = abc = log(100/%T) 2 - log %T
A = absorbance
a = absorptivity
b = light path of the solution in cm
c = concentration of the substance of interest
%T = per cent transmittance—the ratio of transmitted light to incident light
Beer,August, German physicist, 1825-1863.
Beer-Lambert law - the absorbance of light is directly proportional to the thickness of the ligand through which the light is being transmitted multiplied by the concentration of absorbing chromophore.
Beer law - the intensity of a color or of a light ray is inversely proportional to the depth of liquid through which it is transmitted.
Lambert,Johann Heinrich, German mathematician and physicist, 1728-1777.
Beer-Lambert law - see under Beer, August
Lambert cosine law - mathematical measure of the intensity of radiation.