I am very confused about Reflection losses of my material. is there any one who can guide me about Reflection losses and Could you provide me the exact Solved equation to calculate Reflection losses? Please any body can guide??
The short version is that absorbance is a kind of artificial quantity that was (much later) introduced because of the results of Bouguer and Lambert according to which log (I/I0)=-a*d where "a" is some kind of constant and "d" the pathlength of the light. But Bouguer and Lambert measured the absorption of the atmosphere where reflectance is no big deal, since (basically) the index of refraction of air is practically not much different from that of (empty) space. As Beer did his experiments with liquids/solutions, he was aware of the fact that he has to correct for reflection. Under certain circumstances (thick cuvette, rationg of the transmittance of the solution to the transmittance of the solvent), you might be able to disregard reflectance, under all others the errors can be extremely large. You can get some guidance in https://www.researchgate.net/project/Book-Project-Wave-Optics-in-Infrared-Spectroscopy - Chapter 0... The overall problem is that the Bouguer-Beer-Lambert law is in general not compatible with electromagnetic theory...