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What type of wavelengths do ultraviolet rays have?
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What type of wavelengths do ultraviolet rays have?

User Shilly
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According to who.int,

"The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).Mar 9, 2016"

in short 100-400nm

User B Pete
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