Bottom line: Contrary to what was believed previously, common bacteria that cause infections such as the cold and strep throat â including Streptococcus pneumoniae and Streptococcus pyogenes â can persist for long periods on surfaces like furniture and toys.
Fire-control radar helps aim a gun or missile so that it will hit the target when fired and must be more accurate than search radar. The U.S. military has also developed specialized types of radar. For example, Miniature Synthetic Aperture Radar (MSAR) is used on aircraft to provide high-quality images in all kinds of weather. History of Radar Radar technology began with experiments using radio waves in the laboratory of German physicist Heinrich Hertz in 1887.
The word radar is an acronym derived from the words RAdio Detection And Ranging. It refers to the technique of using radio waves to detect the presence of objects in the atmosphere. Radar was designed shortly before World War II. Its primary purpose was to detect the presence of aircraft. Today, radar is used for a wide array of applications, but primarily to detect precipitation and other meteorological events.