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maya090 10-10-2012
maya090 - Pennsylvania State University (PA)
The fundamental source of an electromagnetic wave is a moving charge. For example, in a transmitting antenna of a radio station, charges are caused to move up and down at the frequency of the radio station. These moving charges set up electric and magnetic fields, the electromagnetic wave, in the space around the antenna.
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ekadant 06-11-2012
ekadant - Belmont Abbey College (NC)
moving impose may be the essential supply of nonparticulate radiation
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