Definitie: “Adjective identifying the second surface to reflect radiation in a telescope. In a radio telescope, the primary reflector is usually the surface of the panels or, in a low-frequency antenna, a wire mesh. This is sometimes referred to as the main reflector or simply, the dish. The _________ reflector, if any, is often called the subreflector.”
Eerste letter: S
Van welk woord is dit de definitie?