Henri Becquerel, in full Antoine-Henri Becquerel, (born December 15, 1852, Paris, France—died August 25, 1908, Le Croisic), French physicist who discovered radioactivity through his investigations of uranium and other substances. Henri Becquerel was born on December 15, 1852, in Paris, France. Becquerel foi o responsável pelos estudos que levaram à descoberta do fenômeno da radioatividade. La radioactivité n’est pas une invention humaine. Furthermore, Henri Becquerel’s son, Jean Becquerel (1878–1953) from the fourth generation also graduated from the E´cole Polytechnique and later became a professor at the Muse´e d’ Histoire Naturelle, and he Niepce de Saint-Victor knew Edmond Becquerel, Henri Becquerel's father. Nach einer normalen schulischen Ausbildung und dem Studium an der berühmten École Polytechnique von 1872 bis 1874 setzte BECQUEREL sein Studium von 1874 bis 1877 an einer Ingenieursschule fort und wurde zum … Becquerel overtog i 1891 efter faderen Edmond Becquerels død dennes to professorater ved hhv. francia fizikus. He inherited a tradition of research from his grandfather, Antoine Cesar Becquerel, who developed the field of electrolysis, and his father, A.E. Dezember 1852 in Paris; † 25. His first academic situation was in 1876 as assistant teacher at the École Polytechnique, where in 1895 he succeeded to the chair of physics. Henri started off his education by attending the Lycée Louis-le-Grand school, a prep school in Paris. Antoine Henri Becquerel (/ˌbɛkəˈrɛl/;[2] French: [ɑ̃ʁi bɛkʁɛl]; 15 December 1852 – 25 August 1908) was a French engineer, physicist, Nobel laureate, and the first person to discover evidence of radioactivity. Antoine Henri Becquerel was born to Alexandre-Edmond Becquerel and Aurelie Quenard in Paris, France, on 15 December, 1852. But the following week Becquerel learned that his uranium salts continued to eject penetrating radiation even when they were not made to phosphoresce by the ultraviolet in sunlight. En 1878, Becquerel devient naturaliste adjoint au Muséum d'Histoire Naturelle, puis professeur de physique appliquée au Muséum. Antoine-Henri Becquerel a étudié à l'École polytechnique. Antoine Henri Becquerel ([ɑ̃ˈtwan ɑ̃ˈri bɛk ə ˈrɛl]; 15. joulukuuta 1852 – 25. elokuuta 1908) oli ranskalainen fyysikko, joka muistetaan parhaiten spontaanin eli luonnollisen radioaktiivisuuden löytämisestä vuonna 1896. Henri Becquerel, 15.12.1852-25.8.1908, fransk fysiker, som opdagede radioaktiviteten. Henri Becquerel, in full Antoine-Henri Becquerel, (born December 15, 1852, Paris, France—died August 25, 1908, Le Croisic), French physicist who discovered radioactivity through his investigations of uranium and other substances. Biografie Henri Becquerel werd geboren in Parijs in een familie die helemaal toegewijd was aan het wetenschappelijk onderzoek. I hope that the experiments which I am pursuing at the moment will be able to bring some clarification to this new class of phenomena. Il naît même dans ces bâtiments, tout comme son père. It required the extension in 1898 of radioactivity to another known element, thorium (by Gerhard Carl Schmidt and independently by Marie Curie), and the discovery of new radioactive materials, polonium and radium (by Pierre and Marie Curie and their colleague, Gustave Bémont), to awaken the world and Becquerel to the significance of his discovery. Henri Becquerel (1852-1908) est issu d'une lignée de physiciens. Omissions? Articles from Britannica Encyclopedias for elementary and high school students. Get exclusive access to content from our 1768 First Edition with your subscription. Découvrez gratuitement l'arbre généalogique de Henri Antoine Becquerel pour tout savoir sur ses origines et son histoire familiale. Istraživao je magnetizam, polarizaciju svjetlosti, apsorpciju svjetlosti i fosforescenciju. Se mer » École polytechnique École Polytechniques hovedbygning. La découverte de la radioactivité naturelle par trois savants français à la fin du XIXème siècle – Henri Becquerel puis Pierre et Marie Curie – a posé toute une série d'énigmes, concernant la nature et l'origine de ces rayonnements invisibles, et de l'énergie qu'ils véhiculaient. Articles. On 2 March 1896 he reported: I will insist particularly upon the following fact, which seems to me quite important and beyond the phenomena which one could expect to observe: The same crystalline crusts [of potassium uranyl sulfate], arranged the same way with respect to the photographic plates, in the same conditions and through the same screens, but sheltered from the excitation of incident rays and kept in darkness, still produce the same photographic images. "When different radioactive substances were put in the magnetic field, they deflected in different directions or not at all, showing that there were three classes of radioactivity: negative, positive, and electrically neutral. Henri Becquerel était un physicien français qui a découvert la radioactivité. Becquerel était le troisième membre de sa famille à succéder à ce poste. L'année suivante, il est élu à l'Académie des scienc… [2] SI-enheden for måling af radioaktivitet (Becquerel) er opkaldt efter ham. Il a remporté le prix Nobel de physique en 1903 avec Pierre et Marie Curie pour cette découverte. [21][8] The Berlin-Brandenburg Academy of Sciences and Humanities awarded him the Helmholtz Medal in 1901. Son père, Alexandre Edmond Becquerel, et son grand-père, Antoine Becquerel, étaient des physiciens, professeurs au muséum national d'histoire naturelle de Paris. By 1896 Henri was an accomplished and respected physicist—a member of the Académie 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. 1903 Nobel Fizik Ödülü sahibi. Antoine Henri Becquerel (15 Aralık 1852 – 25 Ağustos 1908), Fransız fizikçi, radyoaktivitenin kaşiflerinden. For work in this field he, along with Marie Skłodowska-Curie (Marie Curie) and Pierre Curie,[3] received the 1903 Nobel Prize in Physics. Il découvre en 1819 la piézo-électricité des cristaux, observe en 1827 l'existence de corps diamagnétiques et imagine, en 1829, la pile impolarisable à deux liquides, qui sera par la suite vulgarisée par l'Anglais John Frederic Daniell. He discovered this phenomenon while experimenting with uranium and a photographic plate. Our editors will review what you’ve submitted and determine whether to revise the article. Il partageait son temps entre l'enseignement à l'École polytechnique et quelques travaux de recher Antoine Henri Becquerel (1852-1908), son of the lastnamed, who succeeded to his chair at the Musee d'Histoire Naturelle in 1892, was born in Paris on the 15th of December 1852, studied at the Ecole Polytechnique, where he was appointed a professor in 1895, and in 1875 entered the department des post Henri BECQUEREL, fils d'Edmond naît à paris en 1852 dans ce Muséum où son père est né, habite et travaille. Henri Becquerel, in full Antoine-Henri Becquerel, (born December 15, 1852, Paris, France—died August 25, 1908, Le Croisic), French physicist who discovered radioactivity through his investigations of uranium and other substances. Jean Becquerel est né à Parisle 17 février 1878, ancien élève de l'école Polytechnique (promotion 1897), il succède à son père Henri Becquerel à la chaire de physique appliquée du Muséum national d'histoire naturelle. Henri Becquerel Beatha Ainm slàn Antoine Henri Becquerel Breith Paris, 15 dhen Dùbhlachd 1852 Dùthaich An FhraingBàs Le Croisic, 25 dhen Lùnastal 1908 Àite … Paul Becquerel était le fils de l'agriculteur André Paul Becquerel (1856-1904) et le neveu du physicien Henri Becquerel (1852-1908), découvreur de la radioactivité naturelle. If one places between the phosphorescent substance and the paper a piece of money or a metal screen pierced with a cut-out design, one sees the image of these objects appear on the negative ... One must conclude from these experiments that the phosphorescent substance in question emits rays which pass through the opaque paper and reduce silver salts.[16][17]. Let us know if you have suggestions to improve this article (requires login). Early life Antoine Henri Becquerel was born on 15 Il épouse Lucie JAMIN, fille de son professeur de Physique à l'Ecole Polytechnique (JAMIN est un opticien de renom et académicien). Antoine H Becquerel (1852-1908) was a French scientist renowned for his work and subsequent discovery into the evidence of radioactivity for which he was awarded a Nobel Prize. Henri Becquerel Antoine Henri Becquerel Antoine Becquerel, French physicist BornDecember 15 1852(1852-12-15)Paris, FranceDiedAugust 25 1908 (aged 55)Le. Tout au long du XXe siècle, des physiciens devenus célèbres ont appris à apprivoiser ses This was an index of both his and the scientific world’s interest in the subject, for the period saw studies of numerous radiations (e.g., cathode rays, X rays, Becquerel rays, “discharge rays,” canal rays, radio waves, the visible spectrum, rays from glowworms, fireflies, and other luminescent materials), and Becquerel rays seemed not especially significant. Returning to the field he had created, Becquerel made three more important contributions. Becquerel's discovery of spontaneous radioactivity is a famous example of serendipity, of how chance favors the prepared mind. In 1894, he became chief engineer in the Department of Bridges and Highways. Becquerel, (Antoine) Henri (1852–1908) Henri Becquerel was a French physicist who discovered radioactivity . Henri then concerned himself with infrared radiation, examining, among other things, the spectra of different phosphorescent crystals under infrared stimulation. La vie d'Henri Becquerel Élevé au Muséum d'histoire naturelle, sous l'intelligente direction de son père et de son grand-père, Henri Becquerel entre en 1872 à l'École polytechnique ; … Antoine Henri Becquerel (1852-1908) was a French physicist and winner of the 1903 Nobel Prize in Physics. Antoine Henri Becquerel (født 15. december 1852 i Paris, død 25. august 1908 i Le Croisic[1]) var en fransk fysiker, der i 1903 delte Nobelprisen i fysik med Pierre og Marie Curie for sit studie om radioaktivitet. At the end of 1895, Wilhelm Röntgen discovered X rays. He was the son of a professor of applied physics, Alexander Becquerel. Godine 1896. otkrio da uranijeve soli … By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Antoine Henri Becquerel (15 December 1852 – 25 August 1908) was a French physicist, Nobel laureate, and the discoverer of radioactivity along with Marie Skłodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics. [5] In 1874, Henri married Lucie Zoé Marie Jamin, who would die while giving birth to their son, Jean. The intensive research of radioactivity led to Becquerel publishing seven papers on the subject in 1896. [7], In Becquerel's early career, he became the third in his family to occupy the physics chair at the Muséum National d'Histoire Naturelle in 1892. Son grand-père était le physicien Edmond Becquerel . ).[15]. In 1868, Edmond Becquerel published a book, La lumière: ses causes et ses effets (Light: Its causes and its effects). Electricity, magnetism, optical phenomena, and energy were major areas of physical investigation during the 19th century. ), francuski fizičar, nobelovac i jedan od otkrivača radioaktivnosti. Paul Becquerel était le fils de l'agriculteur André Paul Becquerel (1856-1904) et le neveu du physicien Henri Becquerel (1852-1908), découvreur de la radioactivité naturelle. Définition et Explications - Antoine Henri Becquerel (15 décembre 1852, Paris - 25 août 1908, Le Croisic, France) est un physicien français. Becquerel’s last major achievement concerned the physiological effect of the radiation. Becquerel var fødd i Paris i ein familie med stolte tradisjonar innan naturvitskap. [8] Becquerel was elected a Foreign Member of the Royal Society (ForMemRS) in 1908. The SI unit for radioactivity, the becquerel (Bq), is named after him. [4] He studied engineering at the École Polytechnique and the École des Ponts et Chaussées. Ensuite, il étudie les spectres optiques de vapeurs métalliques, enfin l'absorption de la lumièrepar les cristaux, et soutient sa thèse en 1888. In 1903 he shared the Nobel Prize for Physics with Pierre and Marie Curie. During 1896 Becquerel published seven papers on radioactivity, as Marie Curie later named the phenomenon; in 1897, only two papers; and in 1898, none. Becquerel 1903-ban megosztott fizikai Nobel-díjat kapott Pierre és Marie Curie-vel a radioaktivitás felfedezéséért. Muséum d'histoire naturelle og Conservatoire des arts et métiers i Paris. When Ernest Rutherford and Frederick Soddy found similar decay and regeneration in thorium X and thorium, they were led to the transformation theory of radioactivity, which explained the phenomenon as a subatomic chemical change in which one element spontaneously transmutes into another. The far more popular X rays could take sharper shadow photographs and faster. His father was a scientist and employed as a professor of Applied Physics. In 1890 he ma… L’histoire de la radioactivité La radioactivité n’est pas une invention humaine. Becquerel palkittiin löydöstään Nobelin fysiikanpalkinnolla vuonna 1903 yhdessä Pierre ja Marie Curien kanssa. Henri Becquerel Worksheets This is a fantastic bundle which includes everything you need to know about Henri Becquerel across 23 in-depth pages. Henri devient ingénieur en 1877 mais abandonne l'administra… Antoine Henri Becquerel (født 15. december 1852 i Paris, død 25. august 1908 i Le Croisic) var en fransk fysiker, der i 1903 delte Nobelprisen i fysik med Pierre og Marie Curie for sit studie om radioaktivitet.. SI-enheden for måling af radioaktivitet er opkaldt efter ham.. Referencer Becquerel was born in Paris into a wealthy family which produced four generations of physicists: Becquerel's grandfather (Antoine César Becquerel), father (Alexandre-Edmond Becquerel), and son (Jean Becquerel). [26][27] The uranium-based mineral becquerelite was named after Henri. One was to measure, in 1899 and 1900, the deflection of beta particles, which are a constituent of the radiation in both electric and magnetic fields. Becquerel, who invented a new method for spectroscopic analysis. From the charge to mass value thus obtained, he showed that the beta particle was the same as Joseph John Thomson’s recently identified electron. Since the sun did not come out in the following days, I developed the photographic plates on the 1st of March, expecting to find the images very weak. Antoine Henri Becquerel (15. prosince 1852, Paříž – 25. srpna 1908, Le Croisic) byl francouzský fyzik, nositel Nobelovy ceny za fyziku v roce 1903 za objev přirozené radioaktivity. He was born to Alexander Edmond Becquerel who was a scientist and Aurelie Quenard.He was born into a family of scientists. – Le Croisic, Bretagne, Franciaország, 1908. augusztus 25.) In 1903 he shared the Nobel Prize for Physics with Pierre and Marie Curie. Antoine Henri Becquerel was born on 15 December 1852 in Paris, France to a family of nobility and active scientific history. He thus confirmed his view that something very similar to X rays was emitted by this luminescent substance at the same time it threw off visible radiation. [3] When one then develops the photographic plate, one recognizes that the silhouette of the phosphorescent substance appears in black on the negative. This discovery led to the development of radiotherapy which is now used to treat cancer. Becquerel had long been interested in phosphorescence, the emission of light of one color following a body's exposure to light of another color. Author of. [18][19], Later in his life in 1900, Becquerel measured the properties of Beta Particles, and he realized that they had the same measurements as high speed electrons leaving the nucleus. Becquerel 1903 -ban megosztott fizikai Nobel-díjat kapott Pierre és Marie Curie -vel a radioaktivitás felfedezéséért. Biographie. En 1892, il succéda à son père à la présidence du Musée d'histoire naturelle, et en 1895, il devint professeur à l'École polytechnique. Voici quelques liens utiles pour réviser les repères chronologiques et spatiaux : For his discovery of radioactivity, Becquerel shared the 1903 Nobel Prize for Physics with the Curies; he was also honoured with other medals and memberships in foreign societies. august 1908) var ein fransk fysikar, nobelprisvinnar og ein av oppdagarane av radioaktiviteten. Antoine-Henri Becquerel (Paris, 15 de dezembro de 1852 — Le Croisic, 25 de agosto de 1908) foi um físico francês. Concurrently, he was assistant naturalist to his father at the museum, where he also assumed the physics professorship upon his father’s death. Together, these were to place the discovery of radioactivity within his reach. Biografie Antoine Henri Becquerel, pe scurt Henri Becquerel, s-a născut la 15 decembrie 1852, la Paris.Tatăl său, Alexandre-Edmond Becquerel, și bunicul său, Antoine Cesar Becquerel, erau fizicieni, profesori la Muséum national d'histoire naturelle de Paris.. Antoine Henri Becquerel (ejtsd: antoán anri bekerel) (Párizs, Franciaország, 1852. december 15. All three won the Nobel Prize in physics in 1903. [6] In 1890 he married Louise Désirée Lorieux. [24] During his lifetime, Becquerel was honored with membership into the Accademia dei Lincei and the Royal Academy of Berlin. Histoire/Géographie/Education civique : en route pour le DNB - Janvier 2014. アンリ・ベクレルアンリ・ベクレルとして知られている、(パリ、フランスで1852年12月15日生まれ)は、発見されたフランスの物理学者だった放射能を、それが不安定であるため、原子核が粒子を放出するプロセス。 彼はピエール・マリー・キュリー、ベクレルの大学院生だった人の後者で物 … Becquerel reported this discovery to the Académie des Sciences at its session on February 24, 1896, noting that certain salts of uranium were particularly active. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. [5] In 1900, Becquerel won the Rumford Medal for his discovery of the radioactivity of uranium and he was made an Officer of the Legion of Honour. Antoine Henri Becquerel Antoine Henri Becquerel (* 15. Ce phénomène naturel a été découvert à la fin du XIXe siècle par un français : Henri Becquerel. own great talent. "[20], In 1889, Becquerel became a member of the Académie des Sciences. La Radiactividad - Marie Curie Pierre Curie Henri Becquerel - Física - Duration: 14:44. I. histoire de la radioactive. He was born in Paris into a family of great scientists. Il est lauréat de la moitié du prix Nobel de physique de 1903 (partagé avec Marie Curie et son mari Pierre Curie ) [ 3 ] . Biografie. アントワーヌ・アンリ・ベクレル(Antoine Henri Becquerel, 1852年 12月15日 - 1908年 8月25日)は フランスの物理学者・化学者。 放射線の発見者であり、この功績により1903年 ノーベル物理学賞を受賞した。 パリ生まれ。息子の ジャン・ベクレル (フランス語版) も物理学者・化学者である。 He studied engineering at the École Polytechnique and the École des Ponts et Chaussées. By May 1896, after other experiments involving non-phosphorescent uranium salts, he arrived at the correct explanation, namely that the penetrating radiation came from the uranium itself, without any need for excitation by an external energy source. Henri Becquerel : la découverte. The SI unit for radioactivity, the becquerel (Bq), is named after him. He was awarded the Nobel Prize for Physics in 1903, which he shared with physicists Pierre and Marie Curie. [8] In 1905, he was awarded the Barnard Medal by the U.S. National Academy of Sciences. Ce phénomène naturel a été découvert à la fin du XIXe siècle par un français : Henri Becquerel. [25] There is a crater named Becquerel on the Moon and also a crater named Becquerel on Mars. In 1896, French scientist Antoine Henri Becquerel discovered radioactivity which was an early contribution to atomic theory. But further experiments led him to doubt and then abandon this hypothesis. He received his scientific education at the Ecole Polytechnique completing it in 1874. through his investigations of uranium and other substances. Updates? Après des études d'ingénieur, il s'oriente vers la recherche, dans le domaine de l'optique, puis plus précisément vers la polarisation. Henri Becquerel n'est pas un nouveau venu dans le monde scientifique : il représente la troisième génération de Becquerel qui se succèdent à la Chaire de Physique du Muséum d'Histoire Naturelle et qu'il occupe depuis 1892, après le décès de son père To test this hypothesis, he placed phosphorescent crystals upon a photographic plate that had been wrapped in opaque paper so that only a penetrating radiation could reach the emulsion. He was a member of a scientific family extending through several generations, the most notable being his grandfather Antoine-César Becquerel (1788–1878), his father, Alexandre-Edmond Becquerel (1820–91), and his son Jean Becquerel (1878–1953). To account for this novelty he postulated a long-lived form of invisible phosphorescence; when he shortly traced the activity to uranium metal, he interpreted it as a unique case of metallic phosphorescence. He began his studies in … [5] Becquerel did not survive much longer after his discovery of radioactivity and died on 25 August 1908, at the age of 55, in Le Croisic, France. Entré à l'Ecole Polytechnique en 1872, il en sort en 1874 dans le corps des Ponts et Chaussées. École polytechnique, også kjent som l'X, er en fransk teknisk høgskole, som har ligget i Palaiseau utenfor Paris (tidligere i Latinerkvarteret i Paris) siden 1976. Fils et petit-fils de physiciens et d'Académiciens des sciences, Becquerel est un enfant du sérail. Antoine Henri Becquerel (15. desember 1852–25. 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. Henri Becquerel se narodil v budově pařížského Muzea přírodních dějin (Muséum national d'histoire naturelle), kde byl profesorem jeho otec, fyzik Edmond Becquerel, i jeho děd, Antoine-César Becquerel. [5][7] In 1901 Becquerel made the discovery that radioactivity could be used for medicine. https://www.britannica.com/biography/Henri-Becquerel, Vigyan Prasar - Biography of Antoine-Henri Becquerel, Atomic Heritage Foundation - Henri Becquerel, The Nobel Prize - Antoine Henri Becquerel, Henri Becquerel - Student Encyclopedia (Ages 11 and up). Antoine Henri Becquerel (15 December 1852 – 25 August 1908) was a French physicist, Nobel laureate, and the discoverer of radioactivity along with Marie Skłodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics. 1870 Antoine Henri Becquerel, né le 15 décembre 1852 à Paris [2] et mort le 25 août 1908 au Croisic, est un physicien français. ... he became the third in his family to occupy the physics chair at the Muséum National d'Histoire Naturelle. [8] His death was caused by unknown causes, but was reported that "he had developed serious burns on his skin, likely from the handling of radioactive materials. – Le Croisic, 25. kolovoza 1908. [14] Niepce de Saint-Victor knew Edmond Becquerel, Henri Becquerel's father. La radioactivité. Né le 15 décembre 1852 à Paris, Henri Becquerel était le fils d'Alexandre Edmond et le petit-fils d'Antoine César Becquerel, tous deux physiciens ayant développé l'étude de la phosphorescence au laboratoire de physique du Muséum d'histoire naturelle. [8] Early in his career, Becquerel also studied the Earth's magnetic fields.[8]. Il fait ses études au Lycée Louis-le-Grand et a comme professeur le grand mathématicien Gaston DARBOUX. He belonged to a family of distinguished scholars and scientists. En 1875, il entra dans le département des ponts et routes, et devint ingénieur en chef en 1894. However, the present experiments, without being contrary to this hypothesis, do not warrant this conclusion. Son grand-père, Antoine Becquerel, est considéré comme le découvreur, en 1839, de l'effet photovoltaïque dont le principe est utilisé dans les capteurs solaires qui devraient produire une part de plus en plus importante de l'énergie électrique "renouvelable" de notre futur. Here is how I was led to make this observation: among the preceding experiments, some had been prepared on Wednesday the 26th and Thursday the 27th of February, and since the sun was out only intermittently on these days, I kept the apparatuses prepared and returned the cases to the darkness of a bureau drawer, leaving in place the crusts of the uranium salt. Becquerel was born in Paris into a wealthy family which produced four generations of physicists: Becquerel's grandfather (Antoine César Becquerel), father (Alexandre-Edmond Becquerel), and son (Jean Becquerel). Library for the History and Understanding of Medicine Wellcome Institute for the History of Medicine 183 Fuston Rd., London NW1 2BN, England UK Henri Becquerel papers, ca. Henri Becquerel (1852-1908) est issu d'une lignée de physiciens. Becquerel began his experiment by exposing a crystal that contained uranium to sunlight. C'est à cette époque de foisonnement intellectuel que commence la carrière de Becquerel. In addition to his teaching and research posts, Becquerel was for many years an engineer in the Department of Bridges and Highways, being appointed chief engineer in 1894. Another discovery was the circumstance that the allegedly active substance in uranium, uranium X, lost its radiating ability in time, while the uranium, though inactive when freshly prepared, eventually regained its lost radioactivity. He won the 1903 Nobel Prize in Physics with Pierre and Marie Curie, the latter of whom was Becquerel’s graduate student. Describing them to the French Academy of Sciences on 27 February 1896, he said: One wraps a Lumière photographic plate with a bromide emulsion in two sheets of very thick black paper, such that the plate does not become clouded upon being exposed to the sun for a day. Il est lauréat de la moitié du prix Nobel de … During the experiment, Röntgen "found that the Crookes tubes he had been using to study cathode rays emitted a new kind of invisible ray that was capable of penetrating through black paper".
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