# 17-26-001

photoeffect

physical, chemical or biological change produced by the interaction of optical radiation with matter, characterized by one photon interacting with one atom or molecule

Note 1 to entry: Photoeffects include photoelectric, photo-optical, photochemical and photobiological effects, but radiant heating is normally not considered a photoeffect.

Note 2 to entry: This entry was numbered 845-06-01 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-897 in CIE S 017:2011.

Publication date: 2020-12