Match each term below with its definition or description Stokes shift the ratio of the number of molecules fluorescing to the total number of excited molecules quantum yield a process in which molecules or atoms in an excited state relax to the ground state through the release of a photon self-quenching vibrational relaxation nonradiative relaxation of a molecule from a low energy vibrational level of an excited electronic state to a high energy vibrational level of a lower energy electronic state resonance fluorescence internal conversion observed when excited atoms or molecules emit radiation that is the same wavelength as the radiation used to excite them fluorescence the difference between the wavelength of radiation used to excite an atom or molecule and the wavelength of radiation emitted by the atom or molecule emitted during relaxation occurs when an unexcited analyte atom or molecule absorbs the radiation emitted from an excited analyte atom or molecule occurs as excited atoms or molecules collide with surrounding molecules such as the solvent and lost energy without emission of a photon