Beer-Lambert Law for Atmospheric Absorption

Introduction to the Beer-Lambert Law Calculator

The Beer-Lambert law describes the linear relationship between absorbance and concentration of an absorbing species. In this formula, A is the absorbance, ε (epsilon) is the molar absorptivity, l is the path length of the light through the material, and c is the concentration of the absorbing species.

Parameter usage:

• molarAbsorptivity= molar absorptivity coefficient (ε)
• pathLength= path length through which light travels (l)
• concentration= concentration of the species (c)

Example valid values:

• molarAbsorptivity= 2.5
• pathLength= 1.0
• concentration= 0.5

Output:

• absorbance= absorbance of the species

Data Validation

The molar absorptivity must be greater than zero, the path length must be greater than zero, and the concentration must not be negative.

Summary

This calculator takes into account the molar absorptivity, path length, and concentration to calculate the absorbance of light by a species in solution. It is commonly used to determine the concentration of an unknown sample if the molar absorptivity is known.