Ultraviolet lys: Forskelle mellem versioner

UV forekommer naturligt i solstråling. UVD og UVC absorberes fuldstændigt i atmosfæren og når altså ikke ned til Jordens overflade. UVB absorberes i vid udstrækning i [[ozonlaget]]. UVA absorberes ikke i atmosfæren og når altså usvækket frem til Jordens overflade.

<ref>[http://www.macam.com/refer.htm Fra: Penetration of solar UVB radiation in shallow tropical waters and its potential biological effects on coral reef; results from the central Indian Ocean and Andaman Sea. Richard P. Dunne, Barbara E. Brown. Department of Marine Science and Costal Management, University of Newcastle, Newcastle upon Tyne NE1 7RU, United Kingdom. Marine Ecology Progress Series Vol. 144: pp 109-118, 1996] Citat: "...Penetration of solar UVB radiation in shallow tropical waters and its potential biolbiological effects on coral reef; results from the central Indian Ocean and Andaman Sea...Ed (UVB) at 5 m depth was found to decrease to 12% of the incident irradiance at the mid ocean atoll, to 2% for the high island site, and to 0.4% in the turbid waters of the inshore reef. A 1% Ed(UVB) depth was computed for each site and found to be 11, 6 and 3 m respectively..."</ref>