Talk:Optical density

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[edit] Other uses

'Optical density' is sometimes also used to describe a material's refractive index, for example in Bose-Einstein condensate, Speed of light, [1], [2]. R6144 08:16, 23 August 2005 (UTC)

[edit] Where is this definition from?

According to the source http://www.its.bldrdoc.gov/projects/devglossary/ which is cited in this article, optical density is log(1/T), and not log(1/T)/pathlength. Therefore, it would be synonymous with absorbance which is noted at the bottom of the article. I couldn't find the definition listed in the other source. It seems logical to have a distinction between the OD and A, and the term density implies a per length unit, but the problem is that I can't find a source anywhere to back this up.

Justin thats not true!!!!!!!