Phosphoroscope

Phosphoroscope

A phosphoroscope is piece of experimental equipment devised in 1857 by physicist A. E. Becquerel to measure how long it takes a phosphorescent material to stop glowing after it has been excited.cite web|title= Natural Philosophy Collection. Bequerel's Phosphoroscope|publisher=University of Aberdeen|url=http://www.abdn.ac.uk/~nph126/selected.php?id=31|accessdate=2008-04-24]

It consists of two rotating disks with holes in them. The holes are placed on each disk at equal angled radial lines and a given distance from the centre but they do not align with each other. A sample of phosphorescent material is placed in between the two disks. Light coming in through a hole in one of the discs excites the phosphorescent material which then emits light for a short amount of time. The disks are then rotated and by changing their speed the length of time the material glows can be determined.

References

External links

* [http://physics.kenyon.edu/EarlyApparatus/Optics/Phosphoroscope/Phosphoroscope.html Description and image of a Phosphoroscope at the Kenyon College Department of Physics]


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  • Phosphoroscope — Phos*phor o*scope, n. [Phosphorus + scope.] (Physics) An apparatus for observing the phosphorescence produced in different bodies by the action of light, and for measuring its duration. [1913 Webster] …   The Collaborative International Dictionary of English

  • phosphoroscope — [fɔsfɔʀɔskɔp] n. m. ÉTYM. 1866; de phosphoro , et scope. ❖ ♦ Techn. Appareil utilisé pour déterminer la phosphorescence d un corps et en mesurer l intensité …   Encyclopédie Universelle

  • phosphoroscope — [fäs fôr′ə skōp΄] n. [ PHOSPHORO + SCOPE] a device used in observing and measuring the persistence of phosphorescence after the source of light has been removed …   English World dictionary

  • Phosphoroscope — fosforoskopas statusas T sritis Standartizacija ir metrologija apibrėžtis Fosforescencijos trukmės matuoklis. atitikmenys: angl. phosphoroscope vok. Phosphoroscope, n rus. прибор для определения продолжительности фосфоресценции, m; фосфороскоп, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • phosphoroscope — fosforoskopas statusas T sritis Standartizacija ir metrologija apibrėžtis Fosforescencijos trukmės matuoklis. atitikmenys: angl. phosphoroscope vok. Phosphoroscope, n rus. прибор для определения продолжительности фосфоресценции, m; фосфороскоп, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • phosphoroscope — fosforoskopas statusas T sritis fizika atitikmenys: angl. phosphoroscope vok. Phosphoroskop, m rus. фосфороскоп, m pranc. phosphoroscope, m …   Fizikos terminų žodynas

  • phosphoroscope — fosforoskopas statusas T sritis chemija apibrėžtis Fosforescencijos trukmės matuoklis. atitikmenys: angl. phosphoroscope rus. фосфороскоп …   Chemijos terminų aiškinamasis žodynas

  • phosphoroscope — /fos fawr euh skohp , for /, n. an instrument for measuring the duration of evanescent phosphorescence in different substances. [1855 60; PHOSPHORO + SCOPE] * * * …   Universalium

  • phosphoroscope — noun Any of several devices used to measure phosphorescence, and to distinguish it from fluorescence …   Wiktionary

  • phosphoroscope — (fo sfo ro sko p ) s. m. Instrument destiné à observer la phosphorescence très courte qui se manifeste sur beaucoup de substances après qu elles ont été exposées à l insolation. ÉTYMOLOGIE    Phosphore, et du grec, examiner …   Dictionnaire de la Langue Française d'Émile Littré

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