Question

define optical density with example

Answer 1

the degree of which a refractive medium
retards transmitted ray of light .
ex- while measuring a suspension

Answer 2

$hlo.. g$


Optical density is a term used in the field of optical spectroscopy to describe the propagation of a wave through a material. It is often confused with absorbance as they both measure the absorption of electromagnetic waves by the medium through which they pass, however, they are slightly different.

It is calculated as the logarithmic ratio of the intensity of radiation incident on the material to the intensity of radiation transmitted by the material. This value is the total loss of the material which may be occurring due to the absorption, reflection and scattering of the wave as opposed to the value of absorbance which only calculates the loss due to absorption. The optical density of a material is different for different wavelengths.