What do you understand by the term optical density of a medium
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Optical Density
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Optical density of a material is different from the physical density. Optical density is a term used in the field of optical spectroscopy to describe the propagation of a wave through a material. The value of the optical density is calculated as the logarithmic ratio of the radiation incident on the material to the radiation transmitted by the medium. The value of optical density is important in the field of analytical chemistry.
It is measured in the moles per liter and the pathlength taken in centimeter.
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