brightness factor

См. также в других словарях:

• Filling factor — distinguish|fill factor, which is ratio of duration of a pulse in a sequence of pulses to the time interval between pulses.Filling factor, F , is a quantity measuring the efficiency of absorption of pump in the core of a double clad fiber. [D.… …   Wikipedia

• daylight factor — /ˈdeɪlaɪt fæktə/ (say dayluyt faktuh) noun the intensity of light on a horizontal surface inside a building, expressed as a fraction of the intensity when the same horizontal surface is in the open under a sky of uniform brightness …  

• cosmos — /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… …   Universalium

• star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …   Universalium

• JPEG — For other uses, see JPEG (disambiguation). Joint Photographic Experts Group A photo of a cat compressed with successively more lossy compression ratios from right to left Filename extension .jpg …   Wikipedia

• eye, human — ▪ anatomy Introduction  specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit       The eye is protected from mechanical injury… …   Universalium

• photography, 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… …   Universalium

• Stars and planetary systems in fiction — The planetary systems of stars other than the Sun and the Solar System are a staple element in much science fiction. Contents 1 Overview 1.1 The brightest stars …   Wikipedia

• Rings of Uranus — The scheme of Uranus s ring moon system. Solid lines denote rings; dashed lines denote orbits of moons. The planet Uranus has a system of rings intermediate in complexity between the more extensive set around Saturn and the simpler systems around …   Wikipedia

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …   Wikipedia