is coherent whenever the phases of the signals arising from different scattering
centres are correlated and incoherent whenever these phases are uncorrelated.
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. doi:10.1351/goldbook