{"term":{"id":"01808","title":"dissymmetry of scattering","longtitle":"IUPAC Gold Book - dissymmetry of scattering","doi":"10.1351\/goldbook.D01808","code":"D01808","status":"current","definitions":[{"id":1,"text":"The ratio of two Rayleigh ratios for different angles of observation, i.e. \\[z(\\theta _{1},\\, \\theta _{2}) = \\frac{R(\\theta _{1})}{R(\\theta _{2})}\\] \\[\\theta _{1} < \\theta _{2}\\] The angles must be specified; in light scattering it is customary to let \\(\\theta = 1 - \\theta _{1}\\) and, most frequently, \\(\\theta _{1} = 45 ^{\\circ}\\) and \\(\\theta _{2} = 135 ^{\\circ}\\).","links":[{"term":"light scattering","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/L03525"}],"sources":["Purple Book, 1st ed., p. 67 (http:\/\/old.iupac.org\/publications\/books\/author\/metanomski.html)"],"seealso":["PAC, 1983, 55, 931. 'Definitions, terminology and symbols in colloid and surface chemistry. Part 1.14: Light scattering (Provisional)' on page 932 (https:\/\/doi.org\/10.1351\/pac198355060931)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/D01808\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/D01808\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/D01808\/plain"},"citation":"Citation: 'dissymmetry of scattering' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.D01808","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-14T06:50:14+00:00"}}