- fluorescent rays
- characteristic fluorescent r's.
Medical dictionary. 2011.
fluorescent rays
Look at other dictionaries:
characteristic fluorescent rays — secondary rays emitted as a result of the rearrangement of electrons in the inner shells of atoms; identical with characteristic rays (q.v.) except that characteristic rays are caused by the bombardment of the x ray tube target by electrons,… … Medical dictionary
Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… … Wikipedia
fluorescent lamp — noun lamp consisting of a tube coated on the inside with a fluorescent material; mercury vapor in the tube emits ultraviolet radiation that is converted to visible radiation by the fluorescent material • Hypernyms: ↑lamp * * * noun : a tubular… … Useful english dictionary
fluorescent — adj. (of a substance) having or showing fluorescence. Phrases and idioms: fluorescent lamp (or bulb) a lamp or bulb radiating largely by fluorescence, esp. a tubular lamp in which phosphor on the inside surface of the tube is made to fluoresce by … Useful english dictionary
fluorescent lamp — Lamp Lamp (l[a^]mp), n. [F. lampe, L. lampas, adis, fr. Gr. ?, ?, torch, fr. ? to give light, to shine. Cf. {Lampad}, {Lantern}.] 1. A light producing vessel, device, instrument or apparatus; formerly referring especially to a vessel with a wick… … The Collaborative International Dictionary of English
fluorescent screen — noun a transparent screen coated with fluorescent material to show images from X rays … English new terms dictionary
fluorescent screen — noun : a screen (as of cardboard or glass) one face of which is coated with a salt (as calcium tungstate) that emits light under the action of X rays or cathode rays … Useful english dictionary
Bundle of rays — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… … The Collaborative International Dictionary of English
Pencil of rays — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… … The Collaborative International Dictionary of English
Roentgen rays — X ray X ray, X ray X ray([e^]ks r[=a] ), n. [so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity.] (Physics) originally, any of the rays produced when cathode rays strike upon… … The Collaborative International Dictionary of English
