Electromagnetic field
hideThe electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.
The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature (the others are gravitation, the weak interaction, and the strong interaction). The field propagates by electromagnetic radiation; in order of increasing energy (decreasing wavelength) electromagnetic radiation comprises: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field. The way in which charges and currents interact with the electromagnetic field is described by Maxwell's equations and the Lorentz force law.
From a classical perspective, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas, from a quantum mechanical perspective, the field is seen as quantised, being composed of individual particles.
For more information about Electromagnetic field, read the full article at
Wikipedia.
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News tagged with electromagnetic field
Plasma-in-a-bag for sterilizing devices
Nov 09, 2009 |
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The practice of sterilizing medical tools and devices helped revolutionize health care in the 19th century because it dramatically reduced infections associated with surgery. Through the years, numerous ways of sterilization ...
Dell's Latitude Z introduces wireless charging (w/ Video)
Electronics / Consumer & Gadgets
Sep 30, 2009 |
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(PhysOrg.com) -- Dell has introduced its new ultra-thin Latitude Z laptop with the world's first wireless laptop battery charger.
Schrodinger's Cat Experiment Proposed
Sep 24, 2009 |
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(PhysOrg.com) -- One of the classical problems in quantum mechanics concerns a man and his feline companion. The man has placed his cat in an opaque tank and is slowing pumping it full of poison. Now until ...
A New Cloaking Method: This is not a 'Star Trek' or 'Harry Potter' Story (w/ Video)
Aug 17, 2009 |
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(PhysOrg.com) -- University of Utah mathematicians developed a new cloaking method, and it's unlikely to lead to invisibility cloaks like those used by Harry Potter or Romulan spaceships in "Star Trek." Instead, ...
Scientists develop novel ion trap for sensing force and light
Jul 01, 2009 |
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Miniature devices for trapping ions (electrically charged atoms) are common components in atomic clocks and quantum computing research. Now, a novel ion trap geometry demonstrated at the National Institute ...
Scientists discover giant Rydberg atom molecules
Jun 24, 2009 |
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A group of University of Oklahoma researchers led by Dr. James P. Shaffer, Homer L. Dodge Department of Physics and Astronomy, have discovered giant Rydberg molecules with a bond as large as a red blood cell. Determining ...
Toxic molecule may help birds 'see' north and south
Jun 22, 2009 |
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Researchers at the University of Illinois report that a toxic molecule known to damage cells and cause disease may also play a pivotal role in bird migration. The molecule, superoxide, is proposed as a key ...
Radiation Review: Some People May be 'Allergic' to Cell Phones, Computers
May 15, 2009 |
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(PhysOrg.com) -- How exactly does the radiation from electromagnetic fields (EMF) affect the human body? Is it possible that cell phones, computer monitors, TVs, and other electronic devices - which operate ...
Electrosmog on the circuit board
Apr 06, 2009 |
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Their miniature size is their strength - and also their weakness. Be it in cell phones, cars or computers, electronic components are getting smaller and smaller and increasingly powerful. The smaller they ...
