Utah State University
Chlorophyll strongly absorbs photons below 700 nm and transmits above 700 nm. Because of this property, chlorophyll concentration can be estimated by measuring the ratio of transmitted photons though a leaf at specific wavelengths. Chlorophyll concentration is then calculated using empirical relationships.
Zhen, Shuyang and Kusuma, Paul, "Accuracy of the Generic Equation to Convert CCI to Chlorophyll Concentration in the Apogee Model MC-100 Chlorophyll Concentration Meter" (2020). Techniques and Instruments. Paper 17.