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

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 7:00pm11/30/08 7:00pm

Secrets of the Metamaterials that Will Make You Invisible

Invisibility used to be the stuff of comic books and Harry Potter novels. But this week, scientists from UC Berkeley have emerged with two new invisibility-producing "metamaterials," engineered substances that bend electromagnetic waves in ways they've never bent before. They call it "negative refraction." But you… »8/12/08 6:20pm8/12/08 6:20pm