antenna effective length
51Photonic metamaterial — Electromagnetism Electricity · …
52Titan I — Infobox rocket name = Titan I caption = Launch of a Titan I ICBM from Cape Canaveral function = ICBM manufacturer = Martin Company country origin = United States cpl year = 1962 cpl = $1.5m (USD) height = 31 m alt height = diameter = 3.05 m alt… …
53De Havilland Mosquito — Infobox Aircraft name= DH.98 Mosquito type=Fast bomber, fighter bomber, and night fighter manufacturer=de Havilland Aircraft Company caption= Mosquito B Mark IV Series 2, DK338 , in flight after completion c. 1942. IWM Collection designer=Ronald… …
54Short Sunderland — infobox Aircraft name = Sunderland type = Military flying boat manufacturer = Short Brothers caption = designer = first flight = 16 October 1937 introduced = 1938 retired = 1967 status = primary user = Royal Air Force more users = French Navy… …
55Blip-to-scan ratio — In radar systems, the blip to scan ratio, or blip/scan, is the ratio of the number of times a target appears on a radar display to the number of times it could have been seen. [ [http://www.answers.com/topic/blip scan ratio?cat=technology blip… …
56building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
57Convair B-36 — B 36 redirects here. For other meanings, see B36 (disambiguation). B 36 Peacemaker The B 36D used both piston and jet engines …
58BRDM-2 — Infobox Weapon name=BRDM 2 caption=Iraqi BRDM at the U.S. National Infantry Museum, Fort Benning origin=Soviet Union type=Amphibious Armoured Scout Car is vehicle=yes service=1962 present used by=See Operators wars=See Service History designer=V …
59Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology …
60Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …
