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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Ultraviolet_radiation
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INFOTEXT
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1992-09-02
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313b
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10 lines
Ultraviolet radiation is an electromagnetic
radiation invisible to the human eye, of
wavelengths from about 400 to 4nm (where the
X-ray range begins). Physiologically,
ultraviolet radiation is extremely powerful,
producing sunburn and causing the formation
of vitamin D in the skin.
Subject by: Shaun Jay