Physicists in Germany claim to have found the first naturally occurring material that has a negative, rather than a positive, refractive index. The material -- a metallic ferromagnet -- is very ...

Refraction is explained by looking into a pool and seeing Snell's law in action. Unit 6 Segment M: Refraction Refraction is explained by looking into a pool and seeing Snell's law in action. We also ...

Students use mirror equations to determine the position and type. Students use mirror equations to determine the position, type, and size of mirror images for curved mirrors mathematically. Optical ...

Shelby’s team created the ‘left-handed’ material – so called because it reverses one of the well-known ‘right-hand rules’ of physics – from interlocking sections of copper coils and wires. When ...

Negative refraction has been demonstrated with plasmonic materials 8,9 and with discrete nonlinear elements 10, but these approaches suffer from high losses and strong dispersion, which restricts ...