focal centre length
71Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
72Pinhole camera — A pinhole camera is a very simple camera with no lens and a single very small aperture. Simply explained it is a light proof box with a single hole in one side. Light from a scene passes through this single point and projects an inverted image on …
73Optical microscope — Microscope Uses Small sample observation Notable experiments Discovery of cells Inventor Hans Lippershey Zacharias Jans …
74Alston, Cumbria — infobox UK place country = England official name= Alston latitude= 54.8102 longitude= 2.4411 static static image caption= Alston town centre population = 1,128 shire district= Eden shire county = Cumbria region= North West England constituency… …
75Colours, standards and guidons — In the age of line tactics, the unit colour was an important rallying point for the troop. In military organizations, the practice of carrying colours, standards or Guidons, both to act as a rallying point for troops and to mark the location of… …
76climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
77religion — religionless, adj. /ri lij euhn/, n. 1. a set of beliefs concerning the cause, nature, and purpose of the universe, esp. when considered as the creation of a superhuman agency or agencies, usually involving devotional and ritual observances, and… …
78stringed instrument — a musical instrument having strings as the medium of sound production, played with the fingers or with a plectrum or a bow: The guitar, the harp, and the violin are stringed instruments. * * * Any musical instrument that produces sound by the… …
79Defining equation (physics) — For common nomenclature of base quantities used in this article, see Physical quantity. For 4 vector modifications used in relativity, see Four vector. Very often defining equations are in the form of a constitutive equation, since parameters of… …
80List of chess terms — This page explains commonly used terms in chess in alphabetical order. Some of these have their own pages, like fork and pin. For a list of unorthodox chess pieces, see fairy chess piece; for a list of terms specific to chess problems, see chess… …
