





megcornell wrote:Does anybody have a source or article or something leading to where this screen/filter myth came from? Just curious... I've never heard of screen filtering UV light before.
The range of UV wavelengths is:
UVA (400–315)
UVB (315–280)
UVC (< 280)
The Sun emits ultraviolet radiation in the UVA, UVB, and UVC bands, but because of absorption in the atmosphere's ozone layer, 99% of the ultraviolet radiation that reaches the Earth's surface is UVA. Ordinary window glass passes about 90% of the light above 350, but blocks over 90% of the light below 300.

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