Abstract
BIOLOGICAL photosensitized reactions are known to result from the absorption of a wide spectrum of radiation. The energy and therefore the wave-length of light absorbed and the biological changes occurring in photosensitized reactions are obviously closely related. A fundamental law of photochemistry, the Grotthus–Draper law, states that only radiation absorbed by the reacting system is effective in producing chemical change. Thus the radiation producing the photosensitizing reaction (that is, the action spectrum) should correspond to the absorption spectrum of the photosensitizing agent.
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PATHAK, M., FELLMAN, J. Activating and Fluorescent Wave-lengths of Furocoumarins : Psoralens. Nature 185, 382–383 (1960). https://doi.org/10.1038/185382a0
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DOI: https://doi.org/10.1038/185382a0
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