Absorption

This is property of material to convert the radiation they receive (such as light) into different forms of energy, mostly heat. A measure of this property is the degree of absorption a = Fa / F, the ratio of the luminous flux absorbed to the incident luminous flux. (Reflection, Transmittance). a = Fa / F F = incident luminous fluxFa = absorbed luminous fluxFr = reflected luminous fluxFt = transmitted luminous flux


Reflection, Absorption and Transmission in schematic format