low-frequency energy
11Energy level — A quantum mechanical system or particle that is bound that is, confined spatially can only take on certain discrete values of energy. This contrasts with classical particles, which can have any energy. These discrete values are called energy… …
12Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) …
13Low-power communication device — In telecommunication, a low power communication device, also Short Range Device (SRD) is a restricted radiation device, exclusive of those employing conducted or guided radio frequency techniques, used for the transmission of signs, signals… …
14Low Probability of Intercept Radar — A Low Probability of Intercept Radar (LPIR) is designed to be difficult to detect by passive radar detection equipment (such as a radar warning receiver RWR) while it is searching for a target or engaged in target tracking. This characteristic is …
15low — low1 adjective 1》 of less than average height. ↘situated not far above the ground, horizon, etc. ↘(of latitude) near the equator. ↘(of women s clothing) cut so as to reveal the upper part of the breasts. 2》 below average in amount,… …
16Wireless energy transfer — or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous,… …
17Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …
18Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …
19Directed-energy weapon — This article is about practical experiments with energy weapons. For fictional uses, see raygun. Humvee with Active Denial System mounted A directed energy weapon (DEW) emits energy in an aimed direction without the means of a projectile. It… …
20High 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 …
