Theoretical study of fluorescence of photosynthetic pigments at complex dependence of intensity of exciting light on time

Now the methods using the radiance with complex dependence of light intensity on time are applied to research of photosynthesis by means of fluorescence, exciting photosynthetic pigments. One of these methods is applied in PAM fluorimeters—the commercial devices currently widely used to investigate the state of photosynthesizing systems. However, if excitation is performed in this way, the question what components of fluorescence are registered at the output of such devices remains open. In this work an attempt to analyze this problem has been made.