Example image of eyePlorer eyePlorer map for 'Molar absorptivity': Absorbance Chemical species Mole (unit) Wavelength Beer–Lambert law International System of Units Dimensionless quantity Imaginary part Refractive index Mathematical descriptions of opacity Amino acid Biochemistry Protein Tryptophan Isosbestic point Simultaneous equations Absorption cross section Avogadro constant Mass attenuation coefficient Molar mass Transmissometer Thymolphthalein Absorption (electromagnetic radiation) Ellman's reagent NBD-TMA Near infrared spectroscopy Perylene Umbelliferone Electromagnetic spectroscopy Förster resonance energy transfer Ultraviolet-visible spectroscopy Congo red Cavity ring-down spectroscopy Epsilon Absorptivity Micellar liquid chromatography Chlorophyll Transition metal