The systematic investigation of the properties and characteristics of these very short waves was taken up in view of the advantages which they seemed to offer in the field of practical radio ...

Actually, the wave displayed ... field, an electromagnetic field produces current in a wire (or antenna). This current is then amplified and processed by the radio.

Radio waves are used for communication such as television ... Infrared radiation is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect heat sources in ...

IT is now well known that electric waves having a wave-length of less than about 8 metres are of little use for long-distance radio communication, owing to X the apparent inability of the ...

The film explains the concept of electromagnetic waves, particularly focusing on their applications in radar, radio, and television. It describes how a crystal set functions as a simple radio receiver ...

which can then be decoded when the wave is received. Television and radio systems use this principle to broadcast information. Infrared light is used by electrical heaters, cookers for cooking ...

Electromagnetic radiation is the general term for the more familiar light and radio waves, but also includes gamma rays, x rays, ultraviolet rays, and infrared. All of these forms of electromagnetic ...

All forms of electromagnetic radiation, whether they're called waves or rays, are generated by particles in motion. In a radio signal, for example, negatively charged electrons quickly move back ...

A scalable, low-cost device that can generate high-power terahertz waves on a chip, without bulky silicon lenses.