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	Henri Becquerel Encyclopedia (Site not responding. Last check: 2007-10-16)
		Becquerel, and the grandson of Antoine César Becquerel.
		Antoine Henri Becquerel (December 15, 1852 – August 25, 1908) was a French physicist, Nobel laureate, and one of the discoverers of radioactivity.
		Becquerel was born in Paris into a family which, including him and his son, produced four generations of scientists.
	www.hallencyclopedia.com /topic/Henri_Becquerel.html (641 words)

	Radioactivity: Historical Figures
		Henri Becquerel was born into a family of scientists.
		Becquerel not only inherited their interest in science, he also inherited the minerals and compounds studied by his father.And so, upon learning how Wilhelm Roentgen discovered X rays from the fluorescence they produced, Becquerel had a ready source of fluorescent materials with which to pursue his own investigations of these mysterious rays.
		Becquerel concluded "that the phosphorescent substance in question emits radiation which penetrates paper opaque to light." Initially he believed that the sun's energy was being absorbed by the uranium which then emitted X rays.
	www.accessexcellence.org /AE/AEC/CC/historical_background.html (1433 words)

	Henri Becquerel Summary
		Antoine Henri Becquerel was born in Paris on Dec. 15, 1852.
		Becquerel's election as perpetual secretary of the Academy of Sciences in 1908 was one of the numerous honors bestowed on him.
		Becquerel was born in Paris into a scientific family which, including him and his son, produced four generations of scientists.
	www.bookrags.com /Henri_Becquerel (5004 words)

	Becquerel, Antoine-Henri (1852-1908): World of Earth Science
		Becquerel was born in Paris on December 15, 1852.
		Becquerel remained interested in problems of magneto-optics for years, and he returned to the field with renewed enthusiasm in 1897 after Dutch physicist Pieter Zeeman's discovery of the Zeeman effect—whereby spectral lines exposed to strong magnetic fields split—provided new impetus for research.
		Becquerel also studied the magnetic properties of a number of materials and published detailed information on nickel, cobalt, and ozone in 1879.
	science.enotes.com /earth-science/becquerel-antoine-henri (1388 words)

	Röntgen & Becquerel
		Becquerel, a French physicist, was the son and grandson of physicists.
		Becquerel was also familiar with the work of Roentgen who on December 22 1895, "photographed" his wife's hand, revealing the unmistakable image of her skeleton, complete with wedding ring.
		Becquerel concluded "that the phosphorescent substance in question emits radiation which penetrates paper opaque to light." Initially he believed that it was the sun's energy that was being absorbed by the uranium, which, in turn then emitted X-rays.
	members.tripod.com /symatxmisc/Physics/6roentegen.htm (564 words)

	Antoine-Henri Becquerel (1852 - 1908)
		By 1896 Henri was an accomplished and respected physicist--a member of the Academie des Sciences since 1889--but more important than his research thus far were his expertise with phosphorescent materials, his familiarity with uranium compounds, and his general skill in laboratory techniques, including photography.
		Becquerel learned that the X rays issued from the area of a glass vacuum tube made fluorescent when struck by a beam of cathode rays.
		Becquerel reported this discovery to the Academie des Sciences at its session on February 24, 1896, noting that certain salts of uranium were particularly active.
	www.rtstudents.com /radiology/antoine-henri-becquerel.htm (1018 words)

	Henri Becquerel - Definition, explanation
		Antoine Henri Becquerel (December 15, 1852 – August 25, 1908) was a French physicist, Nobel laureate, and one of the discoverers of radioactivity.
		Becquerel was born in Paris into a scientific family which, including him and his son, produced four generations of scientists.
		The SI unit for radioactivity, the becquerel (Bq) is named after him, and also there are Becquerel craters on the Moon and Mars.
	www.calsky.com /lexikon/en/txt/h/he/henri_becquerel.php (454 words)

	energy and matter aim 1
		Becquerel, Antoine Henri (1852-1908) was a French physicist who discovered radioactivity in 1896, an achievement for which he shared the 1903 Nobel Prize in Physics with Pierre Curie (1859-1906) and Marie Curie (1867-1934).
		Becquerel's discovery of radioactivity was prompted by the mathematician Henri Poincaré (1854-1912), who told Becquerel that X-rays were emitted from a fluorescent spot on the glass cathode-ray tube used by Röntgen.
		Becquerel later subjected the radiation from radium to magnetic fields and was able to prove by the amount of deflection that it must consist of the electrons that had been discovered by J.J. Thomson (1856-1940) in 1897.
	www.chemcool.com /biography/becquerel.htm (718 words)

	Henri Becquerel (Site not responding. Last check: 2007-10-16)
		Henri Antoine Becquerel did one such act at the end of last century by forgetting some photographic plates in his drawer for a few days.
		Yet, it is this climate that turned out to be a blessing in diguise for Becquerel, who was born on 15 December 1852 in Croisic and was well known in his town Grande Brière.
		On 20 January 1896, Henri Poincaré, while presenting his research work at the Academy of Sciences, wondered, "if certain mediums whose fluorescence is strong enough could not emit X rays along with the light, whatever the cause of their fluorescence".
	ambafrance-ca.org /HYPERLAB/PEOPLE/_becquer.html (817 words)

	Henri Becquerel
		The material Becquerel chose to work with was a double sulfate of uranium and potassium, which he exposed to sunlight and placed on photographic plates wrapped in fl paper.
		Becquerel concluded "that the phosphorescent substance in question emits radiation which penetrates paper opaque to light." Initially he believed that the sun's energy was being absorbed by the uranium which then emitted X rays.
		Later, Becquerel demonstrated that the radiation emitted by uranium shared certain characteristics with X rays but, unlike X rays, could be deflected by a magnetic field and therefore must consist of charged particles.
	www.csvts.cz /cns/kdojekdo/becquer.htm (291 words)

	BIPM - Becquerel
		Henri Becquerel's early work was concerned with the polarization of light, the phenomenon of phosphorescence and the absorption of light by crystals (his doctoral thesis).
		For his discovery of natural radioactivity in 1896, Henri Becquerel was awarded half of the Nobel Prize for Physics in 1903, the other half being awarded to Pierre and Marie Curie for their study of the Becquerel radiation.
		Allisy, Henri Becquerel: The discovery of radioactivity, Radiat.
	www.bipm.fr /en/si/history-si/radioactivity/becquerel.html (170 words)

	Antoine-Henri Becquerel
		Henri Becquerel was born on December 15, 1852, and was educated at the Lycee Louis-le-Grand,Ecolésar Polytechnique (1872-1874) and at the Ecolésar des Ponts et Chaussees (1874-1877), where he received his engineering training.
		Becquerel's early research was almost exclusively in optics.His first extensive investigations (1875-1882) dealt with the rotation of plane-polarised light by magnetic fields.
		Becquerel's example is comforting to us: His genius emerged because he mistakenly believed in a connection between the penetrating rays and phosphorescence, and because he felt compelled to speak at the academy's meeting.
	www.vigyanprasar.gov.in /scientists/AntoineHenriBecquerel.htm (8228 words)

	Biographie: Antoine Becquerel, 1852-1908
		Becquerel arbeitet als Dozent an der École Polytechnique und ist als Chefingenieur für Brücken- und Straßenbau in der Ministerialabteilung tätig.
		In sieben Veröffentlichungen beschreibt Becquerel den Effekt der von ihm nachgewiesenen Strahlung.
		Becquerel gelingt der photographische Nachweis der magnetischen Ablenkbarkeit der Betastrahlen, eines Teils der radioaktiven Strahlung.
	www.dhm.de /lemo/html/biografien/BecquerelAntoine/index.html (271 words)

	Becquerel, Henri (1852-1908) (Site not responding. Last check: 2007-10-16)
		Henri Becquerel was the French physicist who discovered radioactivity in 1896.
		Becquerel was born in Paris and lectured at the Ecole Polytechnique (1875) until he replaced his father as Professor of Physics at the Natural History Museum in Paris.
		Becquerel believed that the light absorbed by the crystals had been re-emitted as a radiation similar to X-rays (discovered only a few months before), and that this had penetrated the paper and affected the photographic plate.
	www.rdg.ac.uk /physicsnet/units/flap/glossary/biogs/bbecquer.htm (217 words)

	Meeting the Sleeping Genie - The World and I Magazine
		Becquerel pursued his research on the matter and soon found that these invisible radiations given out by the uranium salts could discharge an electroscope (a device for detecting small charges of electricity).
		The 1903 prize for physics was awarded to the discoverer and further explorers of radioactivity, Henri Becquerel, and Marie and Pierre Curie.
		Henri Becquerel's discovery of that small smudge on a photographic plate was a discovery of no small significance, leading as it did to a drastic reformulation of our understanding of the ultimate core of the material world.
	www.worldandi.com /public/1996/june/ar2.cfm (3107 words)

	Henri Becquerel - Wikipedia, the free encyclopedia
		Note that he is the father of Jean Becquerel, the son of A.
		However, prior to actually performing the experiment, Becquerel found that the photographic plates were fully exposed.
		In 1908, the year of his death, Becquerel was elected permanent secretary of the Académie des Sciences.
	en.wikipedia.org /wiki/Henri_Becquerel (555 words)

	Antoine-Henri Becquerel Biography \| World of Physics
		Becquerel remained interested in problems of magneto-optics for years, and returned to the field with renewed enthusiasm in 1897 after Dutch physicist Pieter Zeeman's discovery of the Zeeman effect, whereby spectral lines exposed to strong magnetic fields split, provided new impetus for research.
		In the early 1880s Becquerel began research on a topic his father had been working on for many years--luminescence, or the emission of light from unheated substances.
		The period of quiescence in Becquerel's research career came to an end in 1895 with the announcement of Röntgen's discovery of x rays.
	www.bookrags.com /biography/antoine-henri-becquerel-wop (1504 words)

	Becquerel - HighBeam Encyclopedia (Site not responding. Last check: 2007-10-16)
		Antoine César Becquerel, 1788-1878, was a pioneer in electrochemical science.
		Becquerel made a special study of the voltaic cell, telegraphy, and magnetism and wrote several books on these subjects.
		His son, Antoine Henri Becquerel, 1852-1908, was professor at the École polytechnique, Paris, from 1895.
	www.encyclopedia.com /doc/1E1-becquere.html (280 words)

	timelinescience - matter matters (Antoine Henri Bequerel) - resources
		Antoine-Henri Becquerel was the first person to observe the natural radioactivity of uranium and to propose the presence of previously unknown rays.
		Becquerel's theory was that X-rays might be produced by fluorescent material (this means that it absorbs ultraviolet light and emits it again as visible light).
		Becquerel left his uranium sample and a photographic plate in a drawer.
	www.timelinescience.org /resource/students/matter/beql.htm (153 words)

	Curies
		Becquerel not only inherited their interest in science, he also inherited the minerals and compounds studied by his father.
		The material Becquerel chose was a double sulfate of uranium and potassium which he exposed to sunlight and placed on photographic plates wrapped in fl paper.
		Later, Becquerel demonstrated that the radiation emitted by uranium shared certain characteristics with x-rays but, unlike the latter, could be deflected by a magnetic field and therefore must consist of charged particles.
	www.physics.isu.edu /radinf/cuire.htm (737 words)

	Discovery of Radioactivity
		Henri's father, Alexandre-Edmond Becquerel, and his grandfather, Antoine Csar becquerel, were renowned physicists, both members of the Academy of Sciences and each in his turn professor of Physics at the Muserum of Natural History.
		Henri Becquerel was born on December 15, 1852, and was educated at the Lycee Louis-le-Grand, Ecol Polytechnique (1872-1874) and at the Ecol des Ponts et Chaussees (1874-1877), where he received his engineering training.
		Becquerel succeeded to the post of his father at the Museum, and from then on, his professional life was shared among the Museum, the Polytechnique, and the Ponts et Chaussees.
	www.vigyanprasar.gov.in /dream/apr2001/RADIOACTIVITY.htm (8332 words)

	Becquerel: Free Encyclopedia Articles at Questia.com Online Library
		His son, Antoine Henri Becquerel, 1852â“1908, was professor at the Ãcole polytechnique, Paris, from 1895.
		A becquerel is a unit of radioactivity and the reading in my house was 300 Becquerels per cubic metre.
		Becquerel was able (c.1843) to detect near-infrared radiation by photographic...principle, detect a single quantum of radiant energy, such as Becquerels photographic plate, are called quantum detectors.
	www.questia.com /library/encyclopedia/becquerel.jsp (1492 words)

	Henri Becquerel - Biography
		His father, Alexander Edmond Becquerel, was a Professor of Applied Physics and had done research on solar radiation and on phosphorescence, while his grandfather, Antoine César, had been a Fellow of the Royal Society and the inventor of an electrolytic method for extracting metals from their ores.
		Becquerel's earliest work was concerned with the plane polarization of light, with the phenomenon of phosphorescence and with the absorption of light by crystals (his doctorate thesis).
		Later, Becquerel showed that the rays emitted by uranium, which for a long time were named after their discoverer, caused gases to ionize and that they differed from X-rays in that they could be deflected by electric or magnetic fields.
	nobelprize.org /physics/laureates/1903/becquerel-bio.html (551 words)

	Antoine Henri Becquerel - přirozená radioaktivita \| životopis
		V roce 1874 si Becquerel vzal dceru profesora Polytechnické školy Lucii Jaminovou.
		V roce 1888 získal Antoine Henri Becquerel doktorský titul docteur-ès-sciences.
		Při studiu fluorescence uranových solí roku 1896 Antoine Henri Becquerel objevil přirozenou radioaktivitu.
	www.converter.cz /fyzici/becquerel.htm (207 words)

	Chemie.DE News-Center: Antoine Henri Becquerel - Entdecker der natürlichen Radioaktivität
		Schon Becquerels Großvater Antoine César und auch sein Vater Alexandre Edmond hatten naturwissenschaftlich gearbeitet.
		Becquerel bemerkte, dass die Platte daraufhin schwarz wurde.
		Becquerels naturwissenschaftliche Forschungen gingen jedoch weit über diese Untersuchungen hinaus.
	www.chemie.de /news/d/16766/?pw=a&defop=and&wild=yes&sdate=01%25252525252525252F01%25252525252525252F1995&edate=02%25252525252525252F22%25252525252525252F2006 (349 words)

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