Radio
From The Art and Popular Culture Encyclopedia
(Difference between revisions)
| Revision as of 09:58, 8 June 2008 Jahsonic (Talk | contribs) ← Previous diff |
Revision as of 07:47, 4 October 2013 Jahsonic (Talk | contribs) Next diff → |
||
| Line 1: | Line 1: | ||
| {{Template}} | {{Template}} | ||
| - | # The [[technology]] that allows for the [[transmission]] of [[sound]]. | + | '''Radio''' is the [[wireless]] [[Transmission (telecommunications)|transmission]] of signals through free space by [[electromagnetic radiation]] of a [[frequency]] significantly below that of [[visible light]], in the [[radio frequency]] range, from about 30 kHz to 300 GHz. These waves are called ''[[radio wave]]s''. Electromagnetic radiation [[radio propagation|travels]] by means of oscillating [[electromagnetic field]]s that pass through the air and the [[vacuum]] of space. |
| - | # A device that can capture (receive) the signal sent over radio waves and render the modulated signal as [[sound]]. | + | |
| - | Radio is a [[broadcasting]] [[mass medium]] which enjoyed its greates popularity from the [[1920s]] until the [[1950s]], when it was diplaced by television. | + | Information, such as sound, is carried by systematically changing ([[modulation|modulating]]) some property of the radiated waves, such as their [[amplitude]], [[frequency]], [[phase (waves)|phase]], or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an [[alternating current]] in the conductor. The information in the waves can be [[demodulation|extracted]] and transformed back into its original form. |
| - | Radio which had enjoyed mainstream popularity since the 1920s spawned some important musical tastemakers. In no particular order: [[Electrifying Mojo]], [[Frankie Crocker]], [[Gilles Peterson]], The [[Disco Sucks]] DJs, The [[Hot Mix 5]] and [[Alan Freed]] | + | ==See also== |
| - | + | ;Applications: | |
| - | == Mass medium (1920s - 1950s) == | + | * [[Amateur radio]] |
| - | + | * [[Citizens' band radio]] | |
| - | The 1920s saw the rise of broadcast radio as an entertainment medium. In the 1950s television replaces radio as the dominant mass medium in industrialized countries. | + | * [[Marine and mobile radio telephony]] |
| - | + | * [[Marine VHF radio]] | |
| - | Old-Time Radio (OTR) and the Golden Age of Radio are phrases used to refer to American radio programs mainly broadcast during the 1920s through the late 1950s when music radio started to supplant it. | + | * [[Radio astronomy]] |
| - | + | * [[Radio broadcasting]] | |
| - | Before the expansion of television in the early 1950s, radio was the most popular home entertainment avenue throughout the United States. With the rise of the movie industry, America's appetite for mass entertainment grew. As with films, early radio shows reflected vaudeville origins with cornpone gags and ethnic humor interspersed between song numbers. As the medium matured, sophistication increased. During the 1930s radio featured genres and formats popular in other forms of American entertainment -- adventure, comedy, drama, horror, mystery, musical variety, romance, thrillers -- along with classical music concerts, dance band remotes, farm reports, news and commentary, panel discussions, quiz shows, sidewalk interviews, sports broadcasts, talent shows and weather forecasts. | + | ** [[AM broadcasting]] |
| - | == Stations == | + | ** [[FM broadcasting]] |
| - | + | ** [[Campus radio]] | |
| - | *[[Radio Nova]] | + | ** [[Old-time radio]] |
| - | *[[Radio Centraal]] | + | ** [[Pirate radio]] |
| - | *[[Resonance FM]] | + | ** [[Radio programming]] |
| - | ==Related terms== | + | *** [[Radio documentary]] |
| - | *[[radiation]] | + | * [[Radio navigation]] |
| - | *[[radio station]] | + | ** [[Radio direction finder]] |
| - | *[[ray]] | + | ** [[Direction finding]] |
| + | * [[Wireless energy transfer]] | ||
| + | ;Radio science: | ||
| + | * [[Carrier current]] | ||
| + | * [[Hertz]] | ||
| + | * [[Types of radio emissions]] | ||
| + | ** [[Amplitude modulation]] | ||
| + | ** [[Frequency modulation]] | ||
| + | ** [[Longwave]] / [[Medium wave]] / [[Shortwave]] | ||
| + | * [[Radio propagation]] and [[ionosphere]] | ||
| + | ;Radio technologies: | ||
| + | * [[Batteryless radio]] | ||
| + | * [[Digital radio]] | ||
| + | ** [[Satellite radio]] | ||
| + | * [[Radio software]] | ||
| + | * [[Receiver (radio)]] | ||
| + | ** [[Crystal radio]] | ||
| + | ** [[Superheterodyne receiver]] | ||
| + | ** [[Transistor radio]] | ||
| + | * [[Software-defined radio]] | ||
| + | * [[Tuner (radio)]] | ||
| + | ;Alternatives: | ||
| + | * [[Cable FM]] | ||
| + | * [[Free-space optical communication]] (FSO) | ||
| + | * [[Internet radio]] | ||
| + | * [[Power line communication]] | ||
| + | ;Other: | ||
| + | * [[Antique radio]] | ||
| + | * [[Bandstacked]] | ||
| + | * [[History of radio]] | ||
| + | ** [[Table of years in radio|Years in radio]] | ||
| + | ** [[Timeline of radio]] | ||
| {{GFDL}} | {{GFDL}} | ||
Revision as of 07:47, 4 October 2013
|
Related e |
|
Featured: |
Radio is the wireless transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 30 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
See also
- Applications
- Amateur radio
- Citizens' band radio
- Marine and mobile radio telephony
- Marine VHF radio
- Radio astronomy
- Radio broadcasting
- Radio navigation
- Wireless energy transfer
- Radio science
- Radio technologies
- Batteryless radio
- Digital radio
- Radio software
- Receiver (radio)
- Software-defined radio
- Tuner (radio)
- Alternatives
- Other
Unless indicated otherwise, the text in this article is either based on Wikipedia article "Radio" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on research by Jahsonic and friends. See Art and Popular Culture's copyright notice.
