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Photobiology is the scientific study of the interactions of light (technically, non-ionizing radiation) and living organisms. The field includes the study of photophysics, photochemistry, photosynthesis, photomorphogenesis, visual processing, circadian rhythms, photomovement, bioluminescence, and ultraviolet radiation effects.[1]

The division between ionizing radiation and nonionizing radiation is typically considered to be 10 eV, the energy required to ionize an oxygen atom.


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  1. ^ Smith, Kendric (2013-03-08). The Science of Photobiology. Springer Science & Business Media. ISBN 9781461580614. 

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