ওজোন স্তর: সংশোধিত সংস্করণের মধ্যে পার্থক্য

 

 

* http://www.unep.org/ozone/Public_Information/4Aii_PublicInfo_Facts_OzoneLayer.asp

* NASA. ''Studying Earth's Environment From Space.'' June 2000. (accessed November 3, 2010) http://www.ccpo.odu.edu/~lizsmith/SEES/index.html.

 

 

[[Image:Ozone solar UV absorb DNA action.jpg|thumb|300px|UV-B energy levels at several altitudes. Blue line shows DNA sensitivity. Red line shows surface energy level with 10% decrease in ozone]] [[Image:Ozone altitude UV graph.svg|thumb|280px|Levels of ozone at various altitudes and blocking of different bands of ultraviolet radiation. Essentially all UVC (100–280 nm) is blocked by dioxygen (from 100–200 nm) or else by ozone (200–280 nm) in the atmosphere. The shorter portion of the UV-C band and the more energetic UV above this band causes the formation of the ozone layer, when single oxygen atoms produced by UV [[photolysis]] of dioxygen (below 240 nm) react with more dioxygen. The ozone layer also blocks most, but not quite all, of the sunburn-producing UV-B (280–315 nm) band, which lies in the wavelengths longer than UV-C. The band of UV closest to visible light, UV-A (315–400 nm), is hardly affected by ozone, and most of it reaches the ground. UVA does not cause skin reddening, but there is evidence that it causes long-term skin damage.]]

 

{{Commons category|Ozone layer}}