Invisibility: Just One Facet of the Wide, Wild World of Optical…

Cat's eyes look creepy because, at certain sudden angles, they reflect light directly back at you, the viewer. The ever-popular question of invisibility is wrapped up in that ability to reflect light at certain directions, commonly known as the refractive index. This week, two physicists from the UK and the Czech… » 11/30/08 4:00pm 11/30/08 4:00pm