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electromagnetism |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.04 sec. |
electromagnetismBranch of physics that deals with the relationship between electricity and magnetism. Their merger into one concept is tied to three historical events. Hans C. Orsted's accidental discovery in 1820 that magnetic fields are produced by electric currents spurred efforts to prove that magnetic fields can induce currents. Michael Faraday showed in 1831 that a changing magnetic field can induce a current in a circuit, and James Clerk Maxwell predicted that a changing electric field has an associated magnetic field. The technological revolution attributed to the development of electric power and modern communications can be traced to these three landmarks. |
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| Nobody in the 19th century realized that James Clerk Maxwell's electromagnetism equations eventually would produce television. But there was good reason for the clandestine measures: By late 1943, Oak Ridge's Y-12 plant was using electromagnetism to create the highly enriched uranium that would be used in the "Little Boy" atomic bomb dropped on Hiroshima in 1945, helping to bring the war to an end. I find magnetism, or electromagnetism, contextually compelling as the 'invisible' or immaterial basis of computer technology and of every kind of information recording and transfer. |
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electromagnetism
