Radio
hideRadio is the 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. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, or phase. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
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News tagged with radio
Archaeologists uncover prehistoric landscape beneath Oxford
Other Sciences / Archaeology & Fossils
Nov 04, 2009 |
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(PhysOrg.com) -- Archaeologists excavating the former Radcliffe Infirmary site in Oxford have uncovered evidence of a prehistoric monumental landscape stretching across the gravel terrace between the Thames ...
Carbon Atmosphere Discovered on Neutron Star
Nov 04, 2009 |
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(PhysOrg.com) -- Evidence for a thin veil of carbon has been found on the neutron star in the Cassiopeia A supernova remnant. This discovery, made with NASA's Chandra X-ray Observatory, resolves a ten-year ...
New research could help protect frontline troops
Nov 04, 2009 |
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A team of researchers at Queen's University Belfast's Centre for Secure Information Technologies (CSIT) is working to develop futuristic communications systems that could help protect frontline troops.
Jumping on the bandwagon: Introducing the next generation multi-band radio to emergency responders
Nov 02, 2009 |
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Tom Chirhart knows a lot about radios, but over the last year, he's gotten a real life lesson in supply and demand.
The Sun's Sneaky Variability
Space & Earth / Space Exploration
Oct 28, 2009 |
4.8 / 5 (11) |
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Every 11 years, the sun undergoes a furious upheaval. Dark sunspots burst forth from beneath the sun's surface. Explosions as powerful as a billion atomic bombs spark intense flares of high-energy radiation. ...
Fermi Telescope Caps First Year With Glimpse of Space-Time (w/ Video)
Oct 28, 2009 |
4.6 / 5 (14) |
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During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. It captured more than one thousand discrete sources of gamma ...
Blast from the Past Gives Clues About Early Universe
Oct 28, 2009 |
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(PhysOrg.com) -- Astronomers using the National Science Foundation's Very Large Array (VLA) radio telescope have gained tantalizing insights into the nature of the most distant object ever observed in the ...
Xerox Develops Silver Ink for Cheap Printable Electronics
Oct 27, 2009 |
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(PhysOrg.com) -- Xerox has developed an ink which can be used to print circuits onto plastics, films, and textiles. Although circuits printed on flexible materials aren't new, Xerox's method may be cheap and ...
Google eyeing India 3G market: report
Oct 27, 2009 |
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Internet giant Google is considering entering India's third-generation (3G) telecommunications market, a report said Tuesday.
WHO study suggests link between cell phones and tumors
Oct 27, 2009 |
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(PhysOrg.com) -- Preliminary results of an International investigation by the World Health Organization (WHO) suggest there may be a "significantly increased risk" of some types of brain tumors after use of ...
India says will start 3G auction in January
Oct 25, 2009 |
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India said Saturday a long-delayed auction of radio bandwidth for third generation (3G) telecommunications services will start in January and will be open to foreign companies.
Physicists Turn to Radio Dial for Finer Atomic Matchmaking
Oct 20, 2009 |
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(PhysOrg.com) -- Investigating mysterious data in ultracold gases of rubidium atoms, scientists at the Joint Quantum Institute of the National Institute of Standards and Technology and the University of Maryland ...
Discovery of dwarf galaxy a big find for astronomy team
Oct 20, 2009 |
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In some ways, discovering a new galaxy is all in a day's work for John Cannon, Macalester College assistant astronomy professor.
Smallest nanoantennas for high-speed data networks
Oct 20, 2009 |
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More than 120 years after the discovery of the electromagnetic character of radio waves by Heinrich Hertz, wireless data transmission dominates information technology. Higher and higher radio frequencies are ...
X-Ray Jets from Galaxies
Oct 19, 2009 |
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(PhysOrg.com) -- Some dramatic galaxies eject gigantic, collimated jets of ionized gas millions of light-years long, powered by the massive black holes at their centers. The ionized jets are detected at radio ...
