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- Dictionaryradio/ˈreɪdɪəʊ/
noun
- 1. the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages: "cellular phones are linked by radio rather than wires"
- 2. the activity or industry of broadcasting sound programmes to the public: "she has written much material for radio"
verb
- 1. communicate or send a message by radio: "we radioed for help"
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Radio, sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers. Learn more about the history of radio in this article.
RADIO meaning: 1 : the system or process that is used for sending and receiving signals through the air without using wires often used before another noun; 2 : programs that are broadcast by radio often used before another noun
They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys. (For a fuller treatment, see electromagnetic radiation: Radio waves .)
A receiver that picks up waves that carry sound is called a radio. A radio sends the electric signal through speakers so the sound can be heard. Each radio station sends out radio waves of a certain frequency. A person changes a radio from one frequency to another to hear different stations.
Oct 24, 2024 · Electromagnetic radiation - Radio Waves, Frequency, Wavelength: Radio waves are used for wireless transmission of sound messages, or information, for communication, as well as for maritime and aircraft navigation. The information is imposed on the electromagnetic carrier wave as amplitude modulation (AM) or as frequency modulation ...
Sep 24, 2024 · Gamma rays are electromagnetic radiations such as radio waves, light, and X-rays. Beta radioactivity also produces the neutrino and antineutrino, particles that have no charge and very little mass, symbolized by ν and ν, respectively. In the less common forms of radioactivity, fission fragments, neutrons, or protons may be emitted.
Oct 8, 2024 · For more detailed information about electronic components and techniques used in radio and television communications, see electronics; telecommunication system; radio; and television. Jorge A. Camacho The Editors of Encyclopaedia Britannica
Oct 25, 2024 · Radio technology, transmission and detection of communication signals consisting of electromagnetic waves that travel through the air in a straight line or by reflection from the ionosphere or from a communications satellite. Learn more about the history, development, and principles of radio technology in this article.
radio-frequency identification (RFID), method of wireless communication that uses electromagnetic waves to identify and track tags attached to objects, people, or animals. The attached tags, called RFID tags, store digitally encoded data that can be read by an RFID reader.
Oct 21, 2024 · The entire electromagnetic spectrum, from the lowest to the highest frequency (longest to shortest wavelength), includes all radio waves (e.g., commercial radio and television, microwaves, radar), infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
