Pure and Applied Chemistry

Abstract: Abstract: The second edition of the Glossary of Terms Used in Photochemistry [Pure Appl. Chem. 68, 2223-2286 (1996); <http://www.iupac.org/publications/pac/1996/pdf/6812x2223.pdf>] has been both corrected and updated. Terms have been added related to molecular anisotropy, the use of polarized radiation, nonlinear optical phenomena, and the emerging field of computation of excited species. Some changes have been introduced in this "Glossary" regarding the terms related to radiation energy to make this collection fully compatible with internationally agreed-upon terms. Many links are included to various Web pages listing quantities relevant to the work of photochemists and scientists using photochemical tools.