I'm a little confused, we have tested chemical concentrations based on how much light it can absorb. What i don't understand is why something can have a reading of 60% transmission yet also have an absorption of 22.2% via the equation A = LOG(1/T), T being tranmission, A being absorption. Seems like it should be a 40% absorption. Then i realized i might not quite understand what it means when a spectrometer is reading "Absorption and Transmission". Can someone explain?