A property of a material that changes the speed of light, computed as the ratio of the speed of light in a vacuum to the speed of light through the material. When light travels at an angle between two ...

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 ...

TESTA Analytical provides optimized DRI detector kits for HPLC manufacturers, enhancing performance, versatility and ...

Researchers have developed a dielectric film that has optical and electrical properties similar to air, but is strong enough to be incorporated into electronic and photonic devices -- making them both ...

Light bends when travelling through a concentration gradient of sugar in water. The top layer of liquid is pure water while the bottom layer is concentrated sugar water. In these layers, there is no ...

Viltrox has announced a new 2x teleconverter for Sony E-mount systems. According to Sony Alpha Rumors, the teleconverter is ...