The plane containing the incident light beam and the line from the centre of the scattering
system to the observer.
PAC, 1983, 55, 931
(Definitions, terminology and symbols in colloid and surface chemistry. Part 1.14:
Light scattering (Provisional))
on page 932
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook