The photos show three examples of Scarab beetles as seen without a polarizer in front
of the camera on the left in each pair of photos, and with a left circular polarizer in
front of the camera on the right. The first is Plusiotis resplendens, the "gold
bug," the second is Plusiotis clypealis, a beetle that appears to be fashioned from
silver or stainless steel, and the third is Plusiotis gloriosa, a brilliant green
beetle with gold stripes. Beetles of the Scarab family produce circularly polarized light
from unpolarized light on reflection from their bodies. For details, see the paper by D.
Goldstein, pp. 7944-7950.