Question

What is optical density?

Answer 1

The optical density of a substance is the logarithmic ratio of the intensity of transmitted light to the intensity of the incident light passing through the substance.

Answer 2

OPTICAL DENSITY

an optical medium with higher refractive index is be optically denser than one having a lower refractive index . Thus the ability of a medium can be expressed in terms of its optical density is different from density (mass ÷ volume) of the substance and is the property of optical medium only. A substance with lower density (mass ÷ volume) can be optically denser than other substance having higher density example water is denser than kerosene and olive oil,but kerosene and olive oil are optically denser than water

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