[click on image gets you a larger image]
Here photographic results I got (took multiple images while rotating the filter and changing filters), presented as animated gifs....
This is more of scientific interest, and I like the different colors one gets. If interested I refer to the famous Michel-Levy Chart which explains that well.
Reflected UV photography in polarized light shows quite some usefulness, especially if there are (glossy) surfaces which change the polarization angle of light and which the polarizer filter makes visible. Downside is that one needs about 2 stops more exposure, due to the low approx. 25% transmission.
Some insects are able to see the polarization angle (and btw. we humans can also, but needs some traing: Haidinger's Brush) especially honeybees which navigate using the polarization angle of ultraviolet (UV) light.
I have written more about using UV polarizers HERE
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos