Question
Sat December 01, 2012 By:
 

sir i wanna know what is optical density?i'm not able to find it anywhere....

Expert Reply
Sun December 02, 2012
Optical density is the measure of the transmission of an optical medium for a given wavelength. Higher OD lower transmittence and vice versa e.g; optical density of 1 means 90% of incident light is absorbed. 
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