Translation and analysis of words by ChatGPT artificial intelligence
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Hertzian$524429$ - translation to italian
![antenna]] (small dark vertical line in the center). The E and H fields are perpendicular, as implied by the phase diagram in the lower right.](https://commons.wikimedia.org/wiki/Special:FilePath/Radio waves.svg?width=200 "antenna]] (small dark vertical line in the center). The E and H fields are perpendicular, as implied by the phase diagram in the lower right.")
![dipole resonator]] consisting of a pair of one meter copper wires with a 7.5 mm spark gap between them, ending in 30 cm zinc spheres.<ref name="Appleyard" /> When an [[induction coil]] applied a high voltage between the two sides, sparks across the spark gap created [[standing wave]]s of radio frequency current in the wires, which radiated [[radio wave]]s. The [[frequency]] of the waves was roughly 50 MHz, about that used in modern television transmitters.](https://commons.wikimedia.org/wiki/Special:FilePath/Hertz first oscillator.png?width=200 "dipole resonator]] consisting of a pair of one meter copper wires with a 7.5 mm spark gap between them, ending in 30 cm zinc spheres.<ref name=\"Appleyard\" /> When an [[induction coil]] applied a high voltage between the two sides, sparks across the spark gap created [[standing wave]]s of radio frequency current in the wires, which radiated [[radio wave]]s. The [[frequency]] of the waves was roughly 50 MHz, about that used in modern television transmitters.")
Definition
Wikipedia
Radio waves are a type of electromagnetic radiation with the longest wavelengths in the electromagnetic spectrum, typically with frequencies of 300 gigahertz (GHz) and below. At 300 GHz, the corresponding wavelength is 1 mm (shorter than a grain of rice); at 30 Hz the corresponding wavelength is 10,000 kilometers (6,200 miles) (longer than the radius of the Earth). Like all electromagnetic waves, radio waves in a vacuum travel at the speed of light, and in the Earth's atmosphere at a close, but slightly lower speed. Radio waves are generated by charged particles undergoing acceleration, such as time-varying electric currents. Naturally occurring radio waves are emitted by lightning and astronomical objects, and are part of the blackbody radiation emitted by all warm objects.
Radio waves are generated artificially by an electronic device called a transmitter, which is connected to an antenna which radiates the waves. They are received by another antenna connected to a radio receiver, which processes the received signal. Radio waves are very widely used in modern technology for fixed and mobile radio communication, broadcasting, radar and radio navigation systems, communications satellites, wireless computer networks and many other applications. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves can diffract around obstacles like mountains and follow the contour of the earth (ground waves), shorter waves can reflect off the ionosphere and return to earth beyond the horizon (skywaves), while much shorter wavelengths bend or diffract very little and travel on a line of sight, so their propagation distances are limited to the visual horizon.
To prevent interference between different users, the artificial generation and use of radio waves is strictly regulated by law, coordinated by an international body called the International Telecommunication Union (ITU), which defines radio waves as "electromagnetic waves of frequencies arbitrarily lower than 3,000 GHz, propagated in space without artificial guide". The radio spectrum is divided into a number of radio bands on the basis of frequency, allocated to different uses.
