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Showing posts with label Ultra -voilet Sun Ray. Show all posts
Showing posts with label Ultra -voilet Sun Ray. Show all posts
Ultraviolet (UV) designates a band of the electromagnetic spectrum with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays. UV radiation is present in sunlight constituting about 10% of the total lightoutput of the Sun.
