radiowaves
21Cavity magnetron — Magnetron with section removed (magnet is not shown) …
22Battle of Passchendaele — For other uses, see Passchendaele (disambiguation). Battle of Passchendaele Third Battle of Ypres Part of the Western Front of the First World War …
23Fife — This article is about the area in Scotland. For the musical instrument, see Fife (musical instrument). For other uses, see Fife (disambiguation). Coordinates: 56°15′00″N 3°12′00″W / …
24Charles Kennedy — For other people named Charles Kennedy, see Charles Kennedy (disambiguation). The Right Honourable Charles Kennedy MP …
25The Fifth Element — This article is about the 1997 film. For other uses, see The Fifth Element (disambiguation). The Fifth Element Theatrical release poster Directed by …
26Vs. (album) — Infobox Album | Name = Vs. Type = studio Artist = Pearl Jam Released = October 19, 1993 Recorded = March 1993 – May 1993 at The Site, Nicasio, California and Potatohead Studio, Seattle, Washington Length = 46:17 Label = Epic Producer = Brendan O… …
27Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …
28Emission spectrum — The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted by the element s atoms or the compound s molecules when they are returned to a lower energy state. Each element s …
29High-gain antenna — The high gain antenna (HGA) is an antenna with a focused, narrow radiowave beam width. This narrow beam width allows more precise targeting of the radio signal also known as a directional antenna. Most commonly referred to during space missions,… …
30Radio Waves — may refer to several things:* Radio Frequency, ie, radio waves of the Electromagnetic spectrum * Radio Waves (Project), a not for profit project allowing British schools to set up a webspace including blogs, videos and audio articles accessible… …
