An electrical device that is capable of sending or receiving messages by means of electromagnetic waves through the air.
A general expression applied to the use of radio waves. Fr: radio
The process of telecommunication by modulation and radiation of electromagnetic waves. Or, specifically, a transmitter, receiver, or transceiver used for communication via electromagnetic waves.
The use of electromagnetic waves, lying in the radio frequency range, for communications purposes.
Modulated radio waves containing information are propagated through space as a means of communication.
A collection of circuits that converts electromagnetic energy gathered from free space to electrical or sound energy, vice versa or both.
The wireless transmission through space of electromagnetic waves in the approximate frequency range from 10 kilohertz to 300,000 megahertz.
Originally the shortened form of radiotelegraphy, derived from radiant or radiating, and applied to its apparatus. Subsequently radio-telephone (point to point) and later the receiver for sound broadcasting (one to many).
Region of the electromagnetic spectrum corresponding to radiation of the longest wavelengths.
A kind of electromagnetic radiation, like visible light, but with wavelengths far longer than the red or even the infrared portion of the spectrum.
The region of the electromagnetic spectrum with wavelengths longer than 10-4 meters. Radio photons have the lowest energy and longest wavelengths in the electromagnetic spectrum.
a communication system based on broadcasting electromagnetic waves
transmit messages via radio waves; "he radioed for help"
indicating radiation or radioactivity; "radiochemistry"
The sending or receiving of messages or effects, and especially of sound, by means of electromagnetic waves without a connecting wire.
Telecommunication by modulation and radiation of electromagnetic waves. A transmitter, receiver, or transceiver used for communication via electromagnetic waves. A general term applied to the use of radio waves.
The wireless transmission and reception of electric impulses or signals by means of electromagnetic waves.
The least energetic form of electromagnetic radiation, having the lowest frequency and the longest wavelength.
a technology that allows the transmission of signals by modulation of electromagnetic waves with frequencies below those of light.
The use of radio frequencies to transmit up-to-the-minute weather forecasts and reports continuously over VHF-FM radio, 24 hours a day, seven days a week.
The sending or receiving of messages or effects, like sound, by means of electromagnetic waves through the air without a connecting wire.
The part of the electromagnetic spectrum whose radiation has the longest wavelengths and smallest frequencies of all types.
electromagnetic waves. By extension, a device transmitting or receiving radio waves.
An instrument that uses electromagnetic waves to communicate with other vessels. VHF (very high frequency) radios are common for marine use, but are limited in range. SSB (single sideband) radios have longer ranges.
(Wireless) 1. Transmission or reception of electromagnetic radiation in the radio frequency band, used to send information through a medium without the use of wires. 2. Equipment used to transmit and receive radio signals.
Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.