high-frequency waves

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• High frequency — (HF) radio frequencies are between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted Medium frequency… …   Wikipedia

• High Frequency Active Auroral Research Program — Armes électromagnétiques Science fiction ou Théorie du complot Arme Tesla Pistolet laser Rayon de la mort Torpilles MHD Avion Aurora HAARP Officiellement développées Pistolet à impulsion électronique Canon de Gauss Canon à rails Canon ma …   Wikipédia en Français

• High Frequency Internet Protocol — High Frequency Internet Protocolacronyms: HFIP or HF IP. Usually associated with Automatic Link Establishment and HF radio data communications. HFIP provides protocol layers enabling internet file transfer, chat, web, or email. HFIP commonly uses …   Wikipedia

• 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

• high-frequency — ˈ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷ adjective Etymology: high frequency 1. : occurring very frequently drills based on the repetition of high frequency words 2. : relating to high frequency: as a. : involving a radio wave of high frequency used especi …   Useful english dictionary

• High frequency active auroral research program — 62°23′30″N 145°09′00″O / 62.39167, 145.15 …   Wikipédia en Français

• high frequency — 1. said of any periodic event or process that recurs at a rate greater than a specified norm. 2. an alternating current where frequency in cycles per second is high in reference to a certain standard. 3. a frequency of sound waves that is above a …   Medical dictionary

• high-frequency (HF) communications — The communications carried out at frequencies between 3 and 30 MHz. HF waves are dependent mostly on reflected sky waves and are affected by ionospheric conditions. HF is used for long range communications. The lower frequencies in this range are …   Aviation dictionary

• high-frequency gravitational wave — noun gravitational radiation, in the megahertz to gigahertz region, which is proposed to have been produced by the Big Bang or by the collision of massive astronomical objects or artificially in the laboratory. Gravitational waves having… …   Wiktionary

• Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… …   Wikipedia

• Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 …   Wikipedia