ULTRAVIOLET LET THERE BE (INVISIBLE) LIGHT! A Presentation Brought To You By REJ Visit www.worldofteaching.comwww.worldofteaching.com For 100s of free.

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ULTRAVIOLET LET THERE BE (INVISIBLE) LIGHT! A Presentation Brought To You By REJ Visit For 100s of free powerpoints

Ultraviolet Radiation between nm on the spectrum. UV part of spectrum divided into regions. Produced by high temperature continuous prism

Ultraviolet: The Past Johann Wilhelm Ritter (1801) –Silver Chloride Melloni and Becquerel (1842) 1920s: Balloons 1946: Rocket Man 1962: Orbiting Solar Observatory (NASA) –First Extreme Data Collection. 1978: International Ultraviolet Explorer 1992: Extreme Ultraviolet Explorer

The Ozone Layer Stratosphere –10-30 Miles UV-A, UV-B, UV- C –99% Telescopes in space The future

Practical Uses Black Light –Authenticate Fluorescent Lamps Spectroscopy Minerals (GFP) Photolithography Electrical Insulation Sterilization Water

UV in Astronomy Used since the 1960s Copernicus Hopkins UV telescope

Diagram of HUT

UVs Effects on Human Body Minor effects on skin Cancer Eye problems Vitamin D

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