According to Einstein’s theory of general relativity, gravitational waves warp spacetime. In the process, they could imprint ...

Magnetrons cause electric charges to oscillate and emit microwaves — a more powerful form of radiation than the radio waves previously used for radar defences. The post-war period saw a ...

Terahertz technology is a field of science and technology that focuses on the electromagnetic waves within the terahertz frequency range. This range falls between microwave and infrared frequencies on ...

Here, we explore the science behind one of the most revolutionary household appliances of the 20th century. Microwaves are electromagnetic waves that fly through space at the speed of light.

Radio waves have wavelengths ranging from thousands of metres down to around 30 cm. This means they can easily travel around large objects, like hills, mountains or buildings. Microwaves have ...

which can then be decoded when the wave is received. Television and radio systems use this principle to broadcast information. Microwaves are used for cooking food and for communications.