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Magnetic field
hideMagnetic fields surround magnetic materials and electric currents and are detected by the force they exert on other magnetic materials and moving electric charges. The magnetic field, at a given point, is specified by both a direction and a magnitude (or strength); as such it is a vector field.
In special relativity, the electric field and magnetic field are two interrelated aspects of a single object, called the electromagnetic field. A pure electric field in one reference frame is observed as a combination of both an electric field and a magnetic field in a moving reference frame.
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News tagged with magnetic field
A new kind of micro-mobility: Moving tiny particles using magnetic fields (w/ Video)
Dec 14, 2009 |
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(PhysOrg.com) -- A new microscopic system devised by researchers in MIT's Department of Materials Science and Engineering could provide a novel method for moving tiny objects inside a microfluidic chip, and ...
FDA researchers identify new MRI safety risk for patients with pacemakers
Dec 15, 2009 |
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FDA researchers have found that certain cardiac pacemakers may inadequately stimulate a patient's heart while undergoing a magnetic resonance imaging (MRI) scan due to the magnetic pulses mixing with the electronic pulses ...
Magnetic Dance of Titan and Saturn To Be Main Attraction during Flyby
Space & Earth / Space Exploration
Dec 14, 2009 |
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(PhysOrg.com) -- When it flies by Saturn's largest moon, Titan, this weekend, NASA's Cassini spacecraft will study the interactions between the magnetic field of Saturn and Titan. The flyby will take place ...
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Physicists see through the opaque with 'T-rays'
Dec 18, 2009 |
4.2 / 5 (10) |
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"T-rays" may make X-rays obsolete as a means of detecting bombs on terrorists or illegal drugs on traffickers, among other uses, contends a Texas A&M physicist who is helping lay the theoretical groundwork to make the concept ...
Colliding auroras produce an explosion of light
Space & Earth / Space Exploration
Dec 17, 2009 |
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(PhysOrg.com) -- A network of cameras deployed around the Arctic in support of NASA's THEMIS mission has made a startling discovery about the Northern Lights. Sometimes, vast curtains of aurora borealis collide, ...
New Study of Meteorite Provides More Evidence for Ancient Life on Mars
Space & Earth / Space Exploration
Dec 17, 2009 |
4.8 / 5 (39) |
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(PhysOrg.com) -- In 1996, when scientists examined a meteorite from Mars previously uncovered in Antarctica, they were intrigued by what looked like microscopic fossils of ancient Martian life forms. Now, ...
An Advance in Superconducting Magnet Technology Opens the Door for More Powerful Colliders
Dec 16, 2009 |
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(PhysOrg.com) -- Preparing for as much as a 10-fold increase in the Large Hadron Collider's luminosity within the next decade, U.S. scientists and engineers have demonstrated a powerful magnet based on an ...
Giant Planet Set for a Cataclysmic Show
Dec 16, 2009 |
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(PhysOrg.com) -- A team of Chinese astronomers have discovered a giant planet close to the exotic binary star system QS Virginis. Although dormant now, in the future the two stars will one day erupt in a violent ...
Icy moons of Saturn and Jupiter may have conditions needed for life
Dec 15, 2009 |
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(PhysOrg.com) -- Scientists once thought that life could originate only within a solar system's "habitable zone," where a planet would be neither too hot nor too cold for liquid water to exist on its surface. ...
Tracking new cancer-killing particles with MRI
Nanotechnology / Nanomaterials
Dec 14, 2009 |
5 / 5 (4) |
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Researchers at Rice University and Baylor College of Medicine (BCM) have created a single nanoparticle that can be tracked in real time with MRI as it homes in on cancer cells, tags them with a fluorescent ...
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