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Roof prism. A roof pentaprism used in Single-lens reflex cameras; the lower right face is the roof ( dach ). A roof prism, also called a Dachkanten prism or Dach prism (from German: Dachkante, lit. "roof edge"), is a reflective prism containing a section where two faces meet at a 90° angle, resembling the roof of a building and thus the name.
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
Development of the Legume Information System is a joint venture between the National Center for Genome Resources (NCGR) and the USDA-ARS at Iowa State University. In 2014, development effort on LIS shifted from the comparative-legumes.org domain to legumeinfo.org. The comparative-legumes site was developed using the Ruby on Rails framework, and ...
Reverse osmosis plant. A reverse osmosis plant is a manufacturing plant where the process of reverse osmosis takes place. Reverse osmosis is a common process to purify or desalinate contaminated water by forcing water through a membrane. Water produced by reverse osmosis may be used for a variety of purposes, including desalination, wastewater ...
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.
APG system. The APG system ( Angiosperm Phylogeny Group system) of plant classification is the first version of a modern, mostly molecular -based, system of plant taxonomy. Published in 1998 by the Angiosperm Phylogeny Group, it was replaced by the improved APG II in 2003, APG III system in 2009 and APG IV system in 2016.
Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...
The Deer Island Prison (c. 1880 –1991) in Suffolk County, Massachusetts was located on Deer Island in Boston Harbor.Once known as the Deer Island House of Industry and later, House of Correction, it held people convicted of drunkenness, illegal possession of drugs, disorderly conduct, larceny, and other crimes subject to relatively short-term sentencing.