Talk:Dynamic light scattering

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Template:Spectroscopy

Spectroscopy?[edit]

The introductory sentece says dynamic light scattering is also called "Photon Correlation Spectroscopy". I don´t get it: Where is the spectroscopy? --Maxus96 (talk) 18:20, 15 August 2009 (UTC)

As I vaguely remember, spectroscopy is very subtle here and there are several detection method. The most commercially viable is detecting infinitesimal shift in laser wavelength upon scattering on molecules, which is done by optical heterodyne detection. The photon correlation is also spectroscopy, but in the time-frequency domain (might be similar to FTIR spectroscopy). Sorry if this is too jargony. Materialscientist (talk) 23:18, 15 August 2009 (UTC)

It says that this is used in physics..? - But isn't that an understatement.. since this is used alot in chemistry as well..? —Preceding unsigned comment added by 130.225.198.198 (talk) 11:05, 9 May 2010 (UTC)

The term Self Beat Spectroscopy was coined by Norman Ford and Photon Correlation Spectroscopy was coined by Pecora. The spectroscopic term relates to the interactions of the Photons at the point of detection. Self Beat Spectoscopy could also be added to the definition. Self-Beat Spectroscopy and Molecular Weight

AbstractHi-Res PDF[2739 KB]PDF w/ Links[2741 KB] N. C. FORD, JR., , R. GABLER, and , F. E. KARASZ University of Massachusetts, Amherst, Mass. 01002 Polymer Molecular Weight Methods Chapter 4, pp 25–54 Chapter DOI: 10.1021/ba-1973-0125.ch004 Advances in Chemistry, Vol. 125 ISBN13: 9780841201873eISBN: 9780841223066 Publication Date (Print): June 01, 1973 Copyright © 1973 —Preceding unsigned comment added by 71.10.228.121 (talk) 20:21, 14 May 2011 (UTC)

Maximum entropy method[edit]

The text says "...reduce the χ2 of the fitted data". This requires further definition. Not only that, but I suspect that what is really minimized is the χ2 per fitted degree of freedom. Finally, the wikipedia maximum entropy page http://en.wikipedia.org/wiki/Principle_of_maximum_entropy does not mention minimizing χ2, so it is unclear why this piece of information is on this page about DLS. — Preceding unsigned comment added by 69.165.148.98 (talk) 18:08, 31 August 2012 (UTC)