Radio

Extracted Attributes

• Medium

  Radio waves (electromagnetic waves)

• Etymology

  Derived from Latin 'radius' (meaning 'spoke of a wheel, beam of light, ray')

• Core Components

  Transmitter, Antenna, Receiver

• Frequency Range

  3 Hz to 300 GHz

• Regulatory Body

  International Telecommunication Union (ITU)

• Technology Type

  Communication and Signaling

• Primary Applications

  Radio communication (broadcasting, cell phones, wireless networking, satellite communication), Radar, Radio navigation (GPS, VOR), Remote control, Remote sensing

• Economic Impact (1920s)

  Transformative technology, amplified social contagion for investing, contributed to speculative bubble before 1929 Stock Market Crash

Timeline

• Alexander Graham Bell adopted 'radiophone' as an alternate name for his photophone optical transmission system. (Source: Wikipedia)

  1881

• German physicist Heinrich Hertz first proved the existence of radio waves. (Source: Summary, Wikipedia, DBpedia)

  1886-11-11

• Italian physicist Guglielmo Marconi developed the first apparatus for long-distance radio communication. (Source: Summary, Wikipedia, DBpedia)

  1890s (mid)

• Guglielmo Marconi sent a wireless Morse Code message to a recipient over a kilometer away. (Source: Summary, Wikipedia, DBpedia)

  1895

• Guglielmo Marconi sent the first transatlantic radio signal. (Source: Summary, Wikipedia, DBpedia)

  1901-12-12

• A major shift began with organizations like General Motors pioneering Consumer Credit, setting the stage for the economic boom that radio would influence. (Source: Related Documents)

  1919 (around)

• The first commercial radio broadcast occurred, transmitting the 1920 United States presidential election returns by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA. (Source: Summary, Wikipedia, DBpedia)

  1920-11-02

• Radio developed into the first electronic mass medium. (Source: Britannica (Web Search))

  1920-1945

• Radio, with companies like RCA, became a transformative technology, amplifying social contagion for investing and the idea of financial democratization, contributing to a speculative bubble. (Source: Related Documents, Summary)

  1920s

• The Stock Market Crash occurred, following an economic boom partly fueled by transformative technologies like radio. (Source: Related Documents, Summary)

  1929

Radio

Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves. They can be received by other antennas connected to a radio receiver; this is the fundamental principle of radio communication. In addition to communication, radio is used for radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location to a receiver that is typically colocated with the transmitter. In radio navigation systems such as GPS and VOR, a mobile navigation instrument receives radio signals from multiple navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device. The existence of radio waves was first proven by German physicist Heinrich Hertz on 11 November 1886. In the mid-1890s, building on techniques physicists were using to study electromagnetic waves, Italian physicist Guglielmo Marconi developed the first apparatus for long-distance radio communication, sending a wireless Morse Code message to a recipient over a kilometer away in 1895, and the first transatlantic signal on 12 December 1901. The first commercial radio broadcast was transmitted on 2 November 1920, when the live returns of the 1920 United States presidential election were broadcast by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA. The emission of radio waves is regulated by law, coordinated by the International Telecommunication Union (ITU), which allocates frequency bands in the radio spectrum for various uses.

Web Search Results

• Radio - Simple English Wikipedia, the free encyclopedia

  Radio is a way to send electromagnetic signals "Signal (electrical engineering)") over a long distance, to deliver information from one place to another. A machine that sends radio waves is called a transmitter, while a machine that "picks up" the signals is called a receiver or antenna. A machine that does both jobs is a "transceiver". When radio signals are sent out to many receivers at the same time, it is called a broadcast. Television also uses radio signals to send pictures and sound. [...] The word "radio" is sometimes used to mean only voiceband broadcasting. Most voiceband broadcasting uses lower frequency and longer wavelength than most television broadcasting. Voiceband broadcasting sends music, news and entertainers including "talk radio". Radio programs were used before there were TV programs. In the 1930s, the US president started sending a message about the country every week to the American people. Companies that make and send radio programming are called radio stations. [...] Radio was first created as a way to send telegraph messages between two people without wires. Then two-way radio brought voice communication, including walkie-talkies and eventually mobile phones.

• Radio | Research Starters - EBSCO

  Radio is a technology that utilizes electromagnetic waves to transmit and receive electrical signals, significantly influencing communication since its early days of Morse code transmission. Despite the rise of television, radio remains a vital medium for news, music, and various audio programming, delivered through platforms such as satellite, cable, and the Internet. The transmission process involves modulating sound into a radio frequency, broadcasting it via antennas, and demodulating the [...] Radio is a technology that involves the use of electromagnetic waves to transmit and receive electric impulses. Since its inception as a method of wirelessly transmitting Morse code, radio communications technology has had a tremendous impact on society. Although television has supplanted radio to a significant extent for public broadcasting, radio continues to play an important role in this arena. Radio broadcasts may be delivered via technologies such as satellites, cable networks, and the [...] Radio waves are categorized into different frequency ranges, each suited for specific applications, from broadcasting to radar and navigation. Historically, radio technology evolved through key inventions by figures such as Heinrich Hertz, Thomas Edison, and Guglielmo Marconi, ultimately leading to the development of FM and digital radio. Various applications include commercial, amateur, marine, and aircraft radio, each serving distinct purposes such as entertainment, emergency communication,

• Radio | Definition, History, & Facts | Britannica

  radio, a form of mass media and 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. From its birth early in the 20th century, broadcast radio astonished and delighted the public by providing news and entertainment with an immediacy never before thought possible. From about 1920 to 1945, radio developed into the first electronic mass [...] Radio is 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. ### Was radio used in World War I? [...] Based on the human voice, radio is a uniquely personal medium, invoking a listener’s imagination to fill in mental images around the broadcast sounds. More readily and in a more widespread fashion than any other medium, radio can soothe listeners with comforting dialogue or background music, or it can jar them back into reality with polemics and breaking news. Radio also can employ a boundless plethora of sound and music effects to entertain and enthrall listeners. Since the birth of this

• Radio - Wikipedia

  The word radio is derived from the Latin word radius, meaning "spoke of a wheel, beam of light, ray." It was first applied to communications in 1881 when, at the suggestion of French scientist Ernest Mercadier") [fr], Alexander Graham Bell adopted radiophone (meaning "radiated sound") as an alternate name for his photophone optical transmission system. [...] The modulated carrier is amplified in the transmitter and applied to a transmitting antenna "Antenna (radio)") which radiates the energy as radio waves. The radio waves carry the information to the receiver location. At the receiver, the radio wave induces a tiny oscillating voltage in the receiving antenna – a weaker replica of the current in the transmitting antenna. This voltage is applied to the radio receiver, which amplifies the weak radio signal so it is stronger, then demodulates it, [...] A modulated radio wave, carrying an information signal, occupies a range of frequencies. The information in a radio signal is usually concentrated in narrow frequency bands called sidebands (SB) just above and below the carrier frequency. The width in hertz of the frequency range that the radio signal occupies, the highest frequency minus the lowest frequency, is called its bandwidth "Bandwidth (signal processing)") (BW). For any given signal-to-noise ratio, a given bandwidth can carry the same

• RADIO Definition & Meaning - Merriam-Webster

  : of, relating to, or operated by radiant energy : of or relating to electric currents or phenomena (such as electromagnetic radiation) of frequencies between about 3000 hertz and 300 gigahertz a : of, relating to, or used in radio or a radio set b : specializing in radio or associated with the radio industry c(1) : transmitted by radio (2) : making or participating in radio broadcasts d : controlled or directed by radio radio 2 of 4 ## noun plural radios 1 a [...] : the wireless transmission and reception of electric impulses or signals by means of electromagnetic waves b : the use of these waves for the wireless transmission of electric impulses into which sound is converted 2 : a radio message 3 : a radio receiving set 4 a : a radio transmitting station b : a radio broadcasting organization c : the radio broadcasting industry d : communication by radio radio 3 of 4 ## verb radioed; radioing; radios transitive verb 1 [...] : to send or communicate by radio 2 : to send a radio message to intransitive verb : to send or communicate something by radio radio- 4 of 4 ## combining form see radi- ## Examples of radio in a Sentence Noun The news was sent by radio. I listen to the radio all the time. I heard the news on the radio. There's a problem with the car's radio. The radio was playing very loudly. The pilot's radio wasn't working. Verb The police radioed for backup.

• Instance Of

  Q11424

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver accepts radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device. Applications of radio waves that do not involve transmitting the waves significant distances, such as RF heating used in industrial processes and microwave ovens, and medical uses such as diathermy and MRI machines, are not usually called radio. The noun radio is also used to mean a broadcast radio receiver. The existence of radio waves was first proven by German physicist Heinrich Hertz on November 11, 1886. In the mid 1890s, building on techniques physicists were using to study electromagnetic waves, Guglielmo Marconi developed the first apparatus for long-distance radio communication, sending a wireless Morse Code message to a source over a kilometer away in 1895, and the first transatlantic signal on December 12, 1901. The first commercial radio broadcast was transmitted on November 2, 1920 when the live returns of the Harding-Cox presidential election were broadcast by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA. The emission of radio waves is regulated by law, coordinated by the International Telecommunication Union (ITU), which allocates frequency bands in the radio spectrum for different uses.