Final answer:
The molar absorptivity constant at 525 nm is a measure of how strongly a substance absorbs light at that wavelength and is used in Beer's law to calculate the concentration of a substance based on the absorbance of light.
Step-by-step explanation:
The molar absorptivity constant, often represented by ε (epsilon), at a specific wavelength such as 525 nm quantifies how strongly a chemical species absorbs light at that wavelength. It is defined as the absorbance (A) of a solution at a given wavelength per molar concentration (c) and path length (l). The unit for molar absorptivity is liters per mole centimeter (L*mol⁻¹*cm⁻¹). The equation A = ε*c*l, where ε is the molar absorptivity constant, A is the absorbance, c is the concentration in mol/L, and l is the path length in cm, is known as Beer's law. If the molar absorptivity constant at 525 nm for a particular compound is required, one must refer to literature values or experimental data for that specific compound.