In a spectrophotometric assay, which statement correctly describes the Beer-Lambert law?

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In spectrophotometry, how much light is absorbed by a sample is described by A = ε l c. Absorbance increases linearly with the amount of absorbing species present (concentration) and with how far the light travels through the sample (path length), scaled by ε, the molar absorptivity, which is a constant that reflects how strongly the species absorbs at a given wavelength. This means doubling the concentration or doubling the path length will double the absorbance (within the linear range), and ε sets how strong the absorption is for that substance at the chosen wavelength. Absorbance is not inherently dependent on pH or time in the basic law, though pH can alter ε if it changes which form of the molecule is present. The expression A = ε l c best captures the relationship described, making it the correct description.