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  1. Mickey
    Mickey on April 3, 2020 at 11:32 am
    Idea: Sun bathing suits and bikinis that are opaque to people, but transparent to the sun
    Link: https://opticalfiltershop.com/shop/bandpas...

    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.

    UV Bandpass Filter – 350nm FWHM 60nm
    Link: https://opticalfiltershop.com/sh
    PIXELTEQ’s ultraviolet (UV) optical bandpass filters deliver precise transmission of specific UV spectral bands while blocking out-of-band signals at higher and lower wavelengths. The multi-edge bandpass filters transmit wavelengths defined by a nominal center wavelength (CWL) and bandwidth (FWHM ... Read more
  3. MeterMan
    MeterMan on January 24, 2020 at 2:23 pm
    Idea: Sun bathing suits and bikinis that are opaque to people, but transparent to the sun
    Link: https://www.quora.com/Is-there-a-material-...

    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.

    Is there a material that is opaque to visible light, but transparent to ultraviolet light? - Quora
    Link: https://www.quora.com/Is-there-a
    Is there a material that is opaque to visible light, but transparent to ultraviolet light?

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