The prototype kilogram – to which all scales are calibrated to – is losing weight. International efforts are striving to redefine the base unit for measuring mass and, in future, redefine the kilogram ...

Researchers have developed a novel, low-cost, ultra-lightweight material that could be used as an effective anti-reflective surface for microwave radiation based on the eyes of moths. Antireflective ...

An integrating sphere is a hollow spherical cavity that features a highly reflective white coating. These devices can be used to measure the total luminous flux from lamps or the power of laser light, ...