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Magnetic field

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Magnetic 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.

For more information about Magnetic field, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.


News tagged with magnetic field

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Tiny nano-electromagnets turn a cloak of invisibility into a possibility

Physics / General Physics

created 7 hours ago | popularity 5 / 5 (2) | comments 1

A team of researchers at the FOM institute AMOLF (The Netherlands) has succeeded for the first time in powering an energy transfer between nano-electromagnets with the magnetic field of light.


Marohn describes breakthrough imaging technology

Researchers are on the path to creating nano-MRI images

Physics / General Physics

created 20 hours ago | popularity 4.6 / 5 (5) | comments 1

(PhysOrg.com) -- Cornell researchers are devising methods to detect the magnetic fields of individual electrons and atomic nuclei, which they hope to use to make a nanoscale version of magnetic resonance imaging.


FDA researchers identify new MRI safety risk for patients with pacemakers

Medicine & Health / Research

created Dec 15, 2009 | popularity 4 / 5 (3) | comments 0

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

Magnetic Dance of Titan and Saturn To Be Main Attraction during Flyby

Space & Earth / Space Exploration

created Dec 14, 2009 | popularity not rated yet | comments 0

(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 ...


A new kind of micro-mobility: Moving tiny particles using magnetic fields

A new kind of micro-mobility: Moving tiny particles using magnetic fields (w/ Video)

Physics / General Physics

created Dec 14, 2009 | popularity 3.7 / 5 (3) | comments 0

(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 ...


A New View of Coronal Waves

A New View of Coronal Waves

Space & Earth / Astronomy

created Dec 11, 2009 | popularity 4 / 5 (1) | comments 1

(PhysOrg.com) -- The corona is the hot outer region of the sun's atmosphere. The corona is threaded by magnetic fields that loop and twist upwards from the sun's surface, driven by motions of its dense atmosphere.


Magnetic field measurements of the human heart at room temperature

Magnetic field measurements of the human heart at room temperature

Physics / General Physics

created Dec 11, 2009 | popularity not rated yet | comments 1

A new optical sensor developed by the American National Institute of Standards and Technology was successfully tested by the Physikalisch-Technische Bundesanstalt (Germany) in the "magnetically best shielded ...


Swift spacecraft

Magnetic Power Revealed in Gamma-Ray Burst Jet

Space & Earth / Astronomy

created Dec 09, 2009 | popularity 4.1 / 5 (9) | comments 8

(PhysOrg.com) -- A specialized camera on a telescope operated by U.K. astronomers from Liverpool has made the first measurement of magnetic fields in the afterglow of a gamma-ray burst (GRB). The result is ...


A see-through surprise: Scientists make solid material transparent to terahertz waves

Physics / Condensed Matter

created Dec 07, 2009 | popularity 4.6 / 5 (19) | comments 1

Very often in science, the unexpected discovery turns out to be the most significant. Rice University Professor Junichiro Kono and his team weren't looking for a breakthrough in the transmission of terahertz signals, but ...


New technology could boost disease detection tests' speed and sensitivity

New technology could boost disease detection tests' speed and sensitivity (w/ Video)

Nanotechnology / Bio & Medicine

created Dec 07, 2009 | popularity 5 / 5 (1) | comments 0

A team led by Yale University scientists has developed a way to rapidly manipulate and sort different cells in the blood using magnetizable liquids. The findings, which will be published the week of December ...


Researchers create 'synthetic magnetic fields' for neutral atoms

Researchers create 'synthetic magnetic fields' for neutral atoms

Physics / Quantum Physics

created Dec 02, 2009 | popularity 4.9 / 5 (15) | comments 2

(PhysOrg.com) -- Achieving an important new capability in ultracold atomic gases, researchers at the Joint Quantum Institute, a collaboration of the National Institute of Standards and Technology and the University ...


Spin polarization achieved in room temperature silicon

Spin polarization achieved in room temperature silicon

Physics / General Physics

created Nov 27, 2009 | popularity 4.8 / 5 (20) | comments 0

(PhysOrg.com) -- A group in The Netherlands has achieved a first: injection of spin-polarized electrons in silicon at room temperature. This has previously been observed only at extremely low temperatures, ...


Cassini Captures Ghostly Dance of Saturn's Northern Lights

Cassini Captures Ghostly Dance of Saturn's Northern Lights (w/ Video)

Space & Earth / Space Exploration

created Nov 24, 2009 | popularity 4.9 / 5 (10) | comments 1

(PhysOrg.com) -- In the first video showing the auroras above the northern latitudes of Saturn, Cassini has spotted the tallest known "northern lights" in the solar system, flickering in shape and brightness ...


First black holes may have incubated in giant, starlike cocoons, says CU-Boulder study

First black holes may have incubated in giant, starlike cocoons

Space & Earth / Astronomy

created Nov 24, 2009 | popularity 4.2 / 5 (20) | comments 22

(PhysOrg.com) -- The first large black holes in the universe likely formed and grew deep inside gigantic, starlike cocoons that smothered their powerful x-ray radiation and prevented surrounding gases from ...


NJIT receives funding to improve Big Bear Telescope, study solar energy

NJIT receives funding to improve Big Bear Telescope, study solar energy

Space & Earth / Astronomy

created Nov 20, 2009 | popularity 4.7 / 5 (6) | comments 1

NJIT researchers are at work on many scientific and technological frontiers. The National Science Foundation has recently provided support that totals nearly $4.3 million for the diverse efforts of the following ...