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TeachMeFinance.com - explain Ultraviolet Radiation Ultraviolet Radiation The term 'Ultraviolet Radiation' as it applies to the area of Earth observation can be defined as ' The energy range just beyond the violet end of the visible spectrum. Although ultraviolet radiation constitutes only about 5 percent of the total energy emitted from the sun, it is the major energy source for the stratosphere and mesosphere, playing a dominant role in both energy balance and chemical composition. Most ultraviolet radiation is blocked by Earth's atmosphere, but some solar ultraviolet penetrates and aids in plant photosynthesis and helps produce vitamin D in humans. Too much ultraviolet radiation can burn the skin, cause skin cancer and cataracts, and damage vegetation'. The term 'Ultraviolet Radiation' as it applies to the area of the weather can be defined as ' Electromagnetic radiation of shorter wavelength than visible radiation but longer than x-rays'. Previous 5 Terms: Ultra-low sulfur diesel (ULSD) fuel ultramarine ultramicroscope Ultraviolet Ultraviolet Index Next 5 Terms: Ultraviolet Radiation (UV) umbelliferous umber umbilical Umbilical cord blood stem cells About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.