VLF Radiation
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VLF-Strahlung — [Abk. für Very Low Frequency Radiation, dt. »Strahlung sehr niedriger Frequenz«], elektromagnetische Strahlung mit einer Frequenz zwischen etwa 300 Hz und 30 000 Hz, wie sie typischerweise von Computerbildschirmen emittiert wird. Die MPR Normen … Universal-Lexikon
Electromagnetic radiation — Electromagnetism Electricity · … Wikipedia
Van Allen radiation belt — Van Allen radiation belts The Van Allen radiation belt is a torus of energetic charged particles (plasma) around Earth, which is held in place by Earth s magnetic field. It is believed that most of the particles that form the belts come from… … Wikipedia
very low-frequency emission — Abbreviated VLF. Radiation emitted by a computer monitor and other common household electrical appliances, such as televisions, hair dryers, electric blankets, and food processors. VLF emissions range from 2 to 400kHz and decline with the… … Dictionary of networking
Dawn chorus (electromagnetic) — VLF spectrogram of electromagnetic chorus, as received by the Stanford University VLF group s wave receiver at Palmer Station, Antarctica. The chorus can be seen between 1000 Hz and 3000 Hz, sandwiched between components of sferics The electromag … Wikipedia
telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… … Universalium
High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project … Wikipedia
Extremely low frequency — (ELF) is the band of radio frequencies from 3 to 30 Hz. ELF was used by the US Navy and Soviet/Russian Navy to communicate with submerged submarines.ExplanationBecause of the electrical conductivity of salt water, submarines are shielded from… … Wikipedia
Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar … Wikipedia
Microwave — This article is about the electromagnetic wave. For the cooking appliance, see Microwave oven. For other uses, see Microwaves (disambiguation). A microwave telecommunications tower on Wrights Hill in Wellington, New Zealand Microwaves, a subset… … Wikipedia
