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Clock Radios, Talking Clock Radios, Portable Radio, Large Button Clock... independentliving.com | Hospital Radio Ipswich :: Radio Shows :: Radio Show Detail hospitalradioipswich.org.... | Emergency Weather Radio - Weather Alert Radio - Portable Weather Radio allegromedical.com |
Wikipedia portals: Culture · Geography · Health · History · Mathematics · Natural sciences · Philosophy · Religion · Society · Technology The Radio Portal  Welcome to Wikipedia's portal for Radio. Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. It does not require a medium of transport. Information is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude or their frequency. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. The word 'radio' is used to describe this phenomenon, and television, radio, and cell phone transmissions are all classed as radio frequency emissions. Selected article The electromagnetic spectrum, extends from frequencies used in the electric power grid (at the long-wavelength end) to gamma radiation (at the short-wavelength end), covering wavelengths from thousands of kilometres down to fractions of the size of an atom. It is commonly said that EM waves beyond these limits are uncommon, although this is not actually true. The 22-year sunspot cycle, for instance, produces radiation with a period of 22 years, or a frequency of 1.4*10-9 Hz. At the other extreme, photons of arbitrarily high frequency may be produced by colliding electrons with positrons at appropriate energy. 1024 Hz photons can be produced today with man-made accelerators. In our universe the short wavelength limit is likely to be the Planck length, and the long wavelength limit is the size of the universe itself (see physical cosmology), though in principle the spectrum is infinite. Selected image This diagram shows both the position of radio waves in the electromagnetic spectrum as well as how radio waves are used for communication. Photo Credit: User:LadyofHats Selected stationBBC Radio 2 is one of the BBC's national radio stations and is the most popular station in the UK. It broadcasts throughout the UK on FM radio between 88 and 91 MHz from its studios in Western House, adjacent to Broadcasting House in central London. Programmes are also relayed on DAB, Sky Digital, Cable TV, Freeview and the Internet. The station started at 7:00am on September 30, 1967, and succeeded the Light Programme, with some of the Light's music shows transferring to the newly-launched Radio 1. The first show however had actually started at 5.30am (on the Light programme) but continued on with Breakfast Special from Paul Hollingdale as Radio 1 split off. CategoriesThe following are categories relating to radio: Radio by country • Radio networks • Radio formats • Radio stations • Radio people • Radio programs • History of radio • Radio drama • Amateur radio • Pirate radio • Types of radios • Radio technology • Radio frequency receivers • Radio hobbies • Radio logos • Radio writers • Years in radio • Military radio systems • Radio astronomy • SETI • Radio-related lists • Radio stubs Radio listsThe following are lists relating to radio: 97.3 FM • 105.9 FM • BBC Radio 4 programmes • Dad's Army radio episodes • Fictional radio stations • FM broadcasting in Egypt • High school radio • Indie radio stations • Q92 • Q107 • Radio Stations of the BBC • Reith Lecture • Sirius Satellite Radio stations • This American Life episodes • UK radio programmes • World's oldest radio stations • XM Satellite Radio channels • Z103 • AOL Radio • Angel Radio • LeShop.FM Selected quote
Selected biographySir Michael Terence Wogan, KBE DL (born August 3 1938) more commonly known as Terry Wogan, is a veteran Irish radio and television broadcaster, who has worked for the British Broadcasting Corporation in the United Kingdom for most of his career. He has been a leading media personality in Ireland and the UK since the late 1960s, and is often referred to as a "national treasure" of both the United Kingdom and his native Ireland.[1][2] Terry Wogan, the son of a grocery store manager in Limerick, was educated at the Jesuit school of Crescent College from the age of eight. He experienced a strong religious upbringing, later commenting that "There were hundreds of churches, all these missions breathing fire and brimstone, telling you how easy it was to sin, how you'd be in hell. We were brainwashed into believing."[3] Despite this, he has often expressed his fondness for the city of his birth, commenting on one occasion that "Limerick never left me, whatever it is, my identity is Limerick."[4] Related portalsWikiProjects
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