SEARCH Articles Figures Tables Absolute Two-Photon Absorption Cross Sections and Spectra Electromagnetic Spectrum The Photon and Radiometric Quantities Electromagnetic spectrum photons Fluorescence spectrum distinguishable photons Fluorescence spectrum photon correlations Light, Photon Energies, and Atomic Spectra One- and Two-Photon Absorption Spectra One-Photon Absorption Spectra Photon absorption spectra Photon impact mass spectra Photon time-delay spectrum Resonant two-photon ionization spectra Silicon photon spectrum Skill 17. 3 Analyzing the relationships among electron energy levels, photons, and atomic spectra Two-photon absorption spectrum Two-photon excitation spectra Two-photon spectra Two-photon spectrum, benzene naphthalene