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Photobiology is the scientific study of the interactions of light (technically, non-ionizing radiation) and living organisms.[1] The field includes the study of photophysics, photochemistry, photosynthesis, photomorphogenesis, visual processing, circadian rhythms, photomovement, bioluminescence, and ultraviolet radiation effects.[2]

The division between ionizing radiation and non-ionizing radiation is typically considered to be a photon energy greater than 10 eV,[3] which approximately corresponds to both the first ionization energy of oxygen, and the ionization energy of hydrogen at about 14 eV.[4]


See also


  1. ^ Smith, Kendrick C. (2014). "What Is Photobiology?". Retrieved 2018-08-02.
  2. ^ Smith, Kendric (2013-03-08). The Science of Photobiology. Springer Science & Business Media. ISBN 9781461580614.
  3. ^ Robert F. Cleveland, Jr.; Jerry L. Ulcek (August 1999). "Questions and Answers about Biological Effects and Potential Hazards of Radiofrequency Electromagnetic Fields" (PDF) (4th ed.). Washington, D.C.: OET (Office of Engineering and Technology) Federal Communications Commission. Archived (PDF) from the original on 2011-10-20. Retrieved 2018-08-02.
  4. ^ Jim Clark (2000). "Ionisation Energy". Archived from the original on 2011-11-26. Retrieved 2018-08-02.

External links