# Beer-Lambert Law for Atmospheric Absorption

 Molar Absorptivity: Path Length: Concentration:

Output: `Press calculate`

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Formula:`A = εlc`

## 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.