Sun bathing suits and bikinis that are opaque to people, but transparent to the sun
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it would have to be made of a fabric with a band pass filter that blocks all wavelengths EXCEPT UV. Not impossible, but not a thing yet. As far as I know. Could be dangerous though, folks will be getting blasted by UV all day long without realising it. So there’s your cancer versus vanity gamble.
So like, opposite of what sunglasses do, right? Sounds good, don’t know if it exists but people are thinking on these lines.
Is a material like this possible? ” A lot of materials will not allow visible light through but will allow UV through, as UV is more powerful, just as X-rays can get through your muscles to your bones but visible light can not as easily.” – but no examples given.