A handful of ultraviolet photos from Hawaii. These were taken using a B+W 403 filter, which lets a bit of infrared through along with the ultraviolet, and the camera & lens are better at handling infrared. So you often end up with a mix of both sides just beyond the visible spectrum. Infrared shows up as red, and ultraviolet shows up as shades of blue and, well, violet. As you can see, most materials are good at reflecting one or the other, but not both.
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