Ozone and Ultra Violet rays
Category: Science > Physics
Asked by: brentb2607-ga
List Price: $2.50
28 Nov 2006 07:51 PST
Expires: 28 Dec 2006 07:51 PST
Question ID: 786198
I've been curious about what really happens when UV-C rays get screened out by the ozone layer and how the wavelength is shortened because of the ozone. Think you could help me out?
Re: Ozone and Ultra Violet rays
Answered By: hedgie-ga on 30 Nov 2006 20:11 PST
The wavelenth does not get shortened. Ozone layer is conductive, and conductive materials absorb radiation: IT IS IMPORTANT TO HAVE O3 IN THE STRATOSPHERE -- It is earth's primary shield against damaging uv-b radiation. This radiation is also short wave (280 - 320 nm) and high intensity. Ozone absorbs radiation in the 220 - 320 nm band and so keeps most of it from penetrating to earth. Why do we want to be shielded from uv-b radiation? http://oregonstate.edu/~muirp/stratozo.htm http://www.fmi.fi/research_atmosphere/atmosphere_2.html http://www.science.sjsu.edu/scied/255/dcurley/uv_light.htm Energy of absorbed radiation is mostly dissipated (converted to heat) but some is re-radiated as lower frequency (longer wavelength) radiation by scattering processes.
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