Absorbance Index

Absorbance Index is measure of the attenuation (reduction in force, effect or value of something) caused by absorption of energy (light) per unit of distance that occurs in an electromagnetic wave of given wavelength propagating in a material medium (smoke) of given refractive index, which can be used to characterise the concentration of particulates in smoke or an aerosol.Note: The value of the absorption index is given by the relation K = bλ/4πn, where K is the absorption index, b is the absorption coefficient, λ is the wavelength in vacuum, and n is the refractive index of the absorptive material, i.e., the propagation medium