photoelectric cell
101John Logie Baird — Infobox Engineer caption = name = John Logie Baird nationality = Scottish birth date = 13 August 1888 birth place = Helensburgh, Dunbartonshire, Scotland death date = 14 June 1946 death place = Bexhill on Sea education = spouse = parents =… …
102Ceilometer — A ceilometer is a device that uses a laser or other light source to determine the height of a cloud base. Ceilometers can also be used to measure the aerosol concentration within the atmosphere.Optical Drum Ceilometer* An optical drum ceilometer… …
103Turbidometry — (the name being derived from turbidity ) is the process of measuring the amount of light that a solution absorbs. Light is passed through a filter creating a light of known wavelength which is then passed through a cuvette containing a solution.… …
104Image dissector — The image dissector was an early all electronic television camera tube invented by Philo Farnsworth.Most experimental television systems in the 1920s and 1930s made use of an electromechanical system, usually a Nipkow disk combined with a single… …
105Waxy corn — (maize) was found in China in 1909. As this plant showed many peculiar traits, the American breeders long used it as a genetic marker to tag the existence of hidden genes in other maize breeding programs. In 1922 a researcher found that the… …
106Aerodrome beacon — An aerodrome beacon is a beacon installed at an airport or aerodrome to indicate its location to aircraft pilots at night.An aerodrome beacon is mounted on top of a towering structure, often a control tower, above other buildings of the airport.… …
107Willoughby Smith — (April 6, 1828, Great Yarmouth, Norfolk July 17, 1891, Eastbourne, Sussex) was an English electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoelectric cells, including… …
108University of Illinois College of Law — The University of Illinois College of Law, or UIUC College of Law is a law school school located in Champaign, Illinois. It is a graduate school of its parent institution, University of Illinois at Urbana Champaign.ProfileThe University of… …
109Parachute mine — A parachute mine is a parachute retarded naval mine dropped from an aircraft. They were mostly used in World War II by the Luftwaffe and initially by the Royal Air Force (RAF) Bomber Command.Blast effectsThese mines were attached to parachutes to …
110electriceye — electric eye n. See photoelectric cell. * * * …
