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.
For more information about Radio, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with radio
Single-Molecule Magnets Open New Door for Information Technology
Mar 09, 2009 |
4.7 / 5 (24) |
2
(PhysOrg.com) -- Recent research by scientists in Italy and France shows that that single molecules have the ability to store information via their magnetic state. Their work is a first step toward a new generation ...
Cosmic strings might emit cosmic sparks, answer cosmological questions
Oct 09, 2008 |
4.1 / 5 (62) |
18
(PhysOrg.com) -- For astronomers, understanding what happened in the early moments of the universe could answer many questions in physics and astronomy. One possible player in the early universe is cosmic strings, which arise ...
Close-up movie shows hidden details in the birth of super-suns (w/ Video)
Nov 16, 2009 |
4.8 / 5 (10) |
1
(PhysOrg.com) -- The constellation of Orion is a hotbed of massive star formation, most prominently in the Great Nebula that sits in Orion's sword. The glowing gas of the Nebula is powered by a group of young ...
Carbon Atmosphere Discovered on Neutron Star
Nov 04, 2009 |
4.7 / 5 (19) |
1
(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 ...
WHO study suggests link between cell phones and tumors
Oct 27, 2009 |
4.2 / 5 (23) |
17
(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 ...
Physicists Turn to Radio Dial for Finer Atomic Matchmaking
Oct 20, 2009 |
4.5 / 5 (4) |
1
(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 ...
Cars may one day mimic fish to avoid collisions
Oct 01, 2009 |
4.9 / 5 (9) |
1
Engineers in Japan say they are a step closer to developing technology they hope will cut the risk of car crashes -- by mimicking the behaviour of fish.
High-School Student Discovers Strange Astronomical Object
Sep 22, 2009 |
4.6 / 5 (20) |
8
(PhysOrg.com) -- A West Virginia high-school student analyzing data from a giant radio telescope has discovered a new astronomical object -- a strange type of neutron star called a rotating radio transient.
A Theory of Dark Matter
Sep 08, 2009 |
3.6 / 5 (41) |
58
Among the most astounding, unexpected, and important achievements of the past century (or even more) have been the discoveries of dark matter and dark energy, collectively dubbed the "dark sector."
Precise Radio-Telescope Measurements Advance Frontier Gravitational Physics
Sep 01, 2009 |
4.5 / 5 (12) |
7
(PhysOrg.com) -- Scientists using a continent-wide array of radio telescopes have made an extremely precise measurement of the curvature of space caused by the Sun's gravity, and their technique promises a ...
New radio chip mimics human ear, could enable universal radio (w/Video)
Jun 03, 2009 |
4.1 / 5 (23) |
2
(PhysOrg.com) -- MIT engineers have built a fast, ultra-broadband, low-power radio chip, modeled on the human inner ear, that could enable wireless devices capable of receiving cell phone, Internet, radio ...
Ghost remains after black hole eruption
May 28, 2009 |
4.8 / 5 (17) |
15
NASA's Chandra X-ray Observatory has found a cosmic "ghost" lurking around a distant supermassive black hole. This is the first detection of such a high-energy apparition, and scientists think it is evidence ...
Rare radio supernova in nearby galaxy is nearest supernova in five years
May 27, 2009 |
4.6 / 5 (8) |
1
(PhysOrg.com) -- The chance discovery last month of a rare radio supernova - an exploding star seen only at radio wavelengths and undetected by optical or X-ray telescopes - underscores the promise of new, ...
The cosmos is green: Researchers catch nature in the act of 'recycling' a star (w/Animations)
May 21, 2009 |
4.4 / 5 (17) |
12
(PhysOrg.com) -- For the first time, researchers have observed a singular cosmic act of rebirth: the transformation of an ordinary, slow-rotating pulsar into a superfast millisecond pulsar with an almost infinitely ...
THEMIS: 'Singing' electrons help create and destroy 'killer' electrons
May 07, 2009 |
4.1 / 5 (7) |
6
Scientists using NASA's fleet of THEMIS spacecraft have discovered how radio waves produced by electrons injected into Earth's near-space environment both generate and remove high-speed "killer" electrons.
