Rainbow Droplets
A photo of water droplets on a DVD, exposed to a cellphone flashlight, simultaneously displays diffraction (by the DVD microsocopic track), reflection (by the metallic label) and refraction (by the water drops). Photographed using a separate SLR camera (18-mm-focal-length lens; f/16).
—Edgar Guevara, CONACYT-Universidad Autonoma de San Luis Potosi, Mexico