photoelectric cell
61Densitometer — Not to be confused with hydrometer which measures mass density of liquids. Heiland Densitometer TRDZ 1 A densitometer is a device that measures the degree of darkness (the optical density) of a photographic or semitransparent material or of a… …
62fax — /faks/, Telecommunications. n. 1. facsimile (def. 2). adj. 2. facsimile (def. 5). v.t. 3. to transmit a facsimile of (printed matter, photographs, or the like) electronically: Fax the information to all our branch offices. [by shortening and resp …
63fire alarm — 1. a signal that warns that a fire has started. 2. a bell, buzzer, siren, horn, etc., that provides such a signal. [1840 50, Amer.] * * * means of warning in case of fire. Originally, watchmen provided the only fire alarm system, but, with… …
64List of Russian people — The Millennium of Russia monument in Veliky Novgorod, featuring the statues and reliefs of the most celebrated people in the first 1000 years of Russian history …
65tube — I (New American Roget s College Thesaurus) n. pipe, hose, conduit; tunnel, subway; slang, television. See passage. II (Roget s IV) n. 1. [A hollow cylinder] Syn. conduit, hose, test tube, tubing, tunnel, loom, subway; see also pipe 1 . 2. [A… …
66фотоэлемент (в спорте ) — фотоэлемент Фотоэлементы используются системе фотофиниша на линии финиша. [Департамент лингвистических услуг Оргкомитета «Сочи 2014». Глоссарий терминов] EN photoelectric cell photocell Photocells are used in photo finish system at… …
67Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …
68Sound recording and reproduction — Sound recorder redirects here. For the audio recording program computer software, see Sound Recorder (Windows). Sound recording and reproduction is an electrical or mechanical inscription and re creation of sound waves, such as spoken voice,… …
69rubidium — rubidic, adj. /rooh bid ee euhm/, n. Chem. a silver white, metallic, active element resembling potassium, used in photoelectric cells and radio vacuum tubes. Symbol: Rb; at. wt.: 85.47; at. no.: 37; sp. gr.: 1.53 at 20°C. [1860 65; < NL, equiv.… …
70pho|to|vol|ta|ic — «FOH toh vol TAY ihk», adjective. 1. generating an electric current when acted on by light or a similar form of radiant energy, as a photoelectric cell is. 2. = photoelectric. (Cf. ↑photoelectric) …
