The Beer-Lambert law relates the absorption of light by a substance to its concentration in solution and path length through which it travels.
Topic 3.11: 3.11 Spectroscopy and the Electromagnetic Spectrum
Beer-Lambert Law cheat sheet for homework
This refers to how much light a substance absorbs at a particular wavelength.
Transmittance: This refers to how much light passes through an object without being absorbed.
In chemistry, this term describes how much solute is dissolved in solvent.