"Toronto-based artists Brad Blucher and Kyle Clements have an exhibition titled “Take a Picture” which features paintings that are invisible to the human eye but visible to cameras. To do this, they use a frequency of light that is outside the visible spectrum but visible to the CCD and CMOS sensors found in digital cameras."
Here is a video about it... or I assume so. I haven't watched it because I don't have sound anymore...
(via Peta Pixel)
