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
Cosmic strings might emit cosmic sparks, answer cosmological questions
Oct 09, 2008 |
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(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 ...
A Theory of Dark Matter
Sep 08, 2009 |
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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."
SETI@home completes a decade of ET search
Space & Earth / Space Exploration
May 01, 2009 |
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The SETI@home project, which has involved the worldwide public in a search for radio-wave evidence of life outside Earth, marks its 10th anniversary on May 17, 2009.
Most Distant Water in the Universe Found
Dec 17, 2008 |
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(PhysOrg.com) -- Astronomers have found the most distant water yet seen in the Universe, in a galaxy more than 11 billion light-years from Earth. Previously, the most distant water had been seen in a galaxy ...
Single-Molecule Magnets Open New Door for Information Technology
Mar 09, 2009 |
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(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 ...
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 ...
New radio chip mimics human ear, could enable universal radio (w/Video)
Jun 03, 2009 |
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(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 ...
High-School Student Discovers Strange Astronomical Object
Sep 22, 2009 |
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(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.
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 ...
Cosmic Lens Reveals Distant Galactic Violence
Oct 20, 2008 |
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(PhysOrg.com) -- By cleverly unraveling the workings of a natural cosmic lens, astronomers have gained a rare glimpse of the violent assembly of a young galaxy in the early Universe. Their new picture suggests ...
Ghost remains after black hole eruption
May 28, 2009 |
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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 ...
NASA Balloon Mission Tunes in to a Cosmic Radio Mystery
Space & Earth / Space Exploration
Jan 07, 2009 |
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(PhysOrg.com) -- Listening to the early universe just got harder. A team led by Alan Kogut of NASA's Goddard Space Flight Center in Greenbelt, Md., today announced the discovery of cosmic radio noise that ...
The cosmos is green: Researchers catch nature in the act of 'recycling' a star (w/Animations)
May 21, 2009 |
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(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 ...
'Printed chips' could be boon for consumers
Aug 12, 2009 |
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Until now, creating the microchips that power all of our electronic gadgets has been a laborious, complex and time-consuming process costing billions of dollars. But if a Milpitas, Calif.-based startup succeeds, making them ...
Ulysses space mission to end
Space & Earth / Space Exploration
Jun 26, 2009 |
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After 18.6 years in space and defying several earlier expectations of its demise, the joint ESA/NASA solar orbiter Ulysses will achieve 'end of mission' on 30 June 2009. The final communication pass with a ...
