the light beam closes down to a point at the focus
1Health care reform debate in the United States — See also: Health care reform in the United States, Health care in the United States, and Uninsured in the United States Health care in the United States Public health care Federal Employees Health Benefits Program Indian Health Service… …
2photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
3List of Dallas episodes — This is a list of episodes of the soap opera Dallas. The original miniseries from 1978 was labeled as Season One when the series was initially released on DVD in 2004. Although Season One officially began with episode that aired September 23,… …
4Star Trek (film) — This article is about the 2009 film. For the 1979 film, see Star Trek: The Motion Picture. For other Star Trek films, see Star Trek (film series). Star Trek International poster Directed by …
5cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …
6photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …
7List of problems solved by MacGyver — This is a list of problems that have been solved by the fictional character MacGyver from the television series of the same name. (This list is not yet comprehensive.) MacGyver employs his resourcefulness and his knowledge of chemistry,… …
8Telescopic sight — Scope redirects here. For other uses, see Scope (disambiguation). View through a 4x rifle scope. A telescopic sight, commonly called a scope, is a sighting device that is based on an optical refracting telescope. They are equipped with some form… …
9List of Dragon Ball Z Kai episodes — Japanese promotional poster of Dragon Ball Kai Dragon Ball Z Kai (known in Japan as Dragon Ball Kai) is a revised version of the ani …
10Star Wars Episode IV: A New Hope — An original 1977 North American theatrical film poster by Tom Jung[1] Directed by George Lucas …
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