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Chemistry
Dalia
17 January, 13:21
What does ultraviolet ray mean
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Nikhil Diaz
17 January, 14:00
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Ultraviolet radiation. Invisible rays that are part of the energy that comes from the sun, can burn the skin, and cause skin cancer ... UVC is the most dangerous type of ultraviolet light but cannot penetrate earth's protective ozone layer.
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