What was the German scientist who first observed Anode rays also an early investigator of?
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Anode ray An anode ray (also positive ray or canal ray) is a beam of positive ions that is created by certain types of gas discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein, in 1886. Later work on anode rays by Wilhelm Wien and J. J. Thomson led to the development of mass spectrometry.
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Eugen Goldstein Eugen Goldstein (5 September 1850 – 25 December 1930) was a German physicist. He was an early investigator of discharge tubes, the discoverer of anode rays, and is sometimes credited with the discovery of the proton.
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Reinhard Mecke Reinhard Mecke (born 14 July 1895 in Stettin; died 30 December 1969) was a German physicist, who focused on chemical physics. He was one of the pioneers of infrared spectroscopy.
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Friedrich Sigmund Merkel Friedrich Sigmund Merkel (5 April 1845 – 28 May 1919) was a leading German anatomist and histopathologist of the late 19th century. In 1875, he provided the first full description of "Tastzellen" (touch cells) which occur in the skin of all vertebrates. They were subsequently given the eponym "Merkel cells" in 1878 by Robert Bonnet (1851–1921).
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Heel effect In X-ray tubes, the heel effect or more accurately, the anode heel effect is a variation of the intensity of X-rays emitted by the anode depending on the direction of emission. Due to the geometry of the anode, X-rays emitted towards the cathode are in general more intense than those emitted perpendicular to the cathode–anode axis. The effect stems from the absorption of X-ray photons before they leave the anode in which they are produced. The probability of absorption depends on the distance the photons travel within the anode material, which in turn depends on the direction of emission.
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Alfred Bucherer Alfred Heinrich Bucherer (* 9 July 1863 in Cologne; † 16 April 1927 in Bonn) was a German physicist, who is known for his experiments on relativistic mass. He also was the first who used the phrase "theory of relativity" for Einstein's theory of special relativity.
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Erhard Kietz Dr. Erhard Karl Kietz (* August 22, 1909 in Leipzig Germany – April 6, 1982 in Blütlingen (Wustrow, Lower Saxony) Germany) was a German-born physicist, who researched frequency constancy of video signals.
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Edward Andrade Edward Neville da Costa Andrade FRS (27 December 1887 – 6 June 1971) was an English physicist, writer, and poet. He told "The Literary Digest" his name was pronounced "as written, i.e., like "air raid", with "and" substituted for "air"." In the scientific world Andrade is best known for work (with Ernest Rutherford) that first determined the wavelength of a type of gamma radiation, proving it was far higher in energies than X-rays known at the time. In popular culture he was best known for his appearances on The Brains Trust.
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Paul Ulrich Villard Paul Ulrich Villard (28 September 1860 – 13 January 1934) was a French chemist and physicist. He discovered gamma rays in 1900 while studying the radiation emanating from radium.
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Friedrich von Hefner-Alteneck Friedrich Heinrich Philipp Franz von Hefner-Alteneck (April 27, 1845 in Aschaffenburg – January 6, 1904 in Biesdorf near Berlin) was a German electrical engineer and one of the closest aides of Werner von Siemens. He is largely remembered for the invention of the Hefner lamp, which provided the measure of luminous intensity used in Germany, Austria and Scandinavia from 1890 to 1942. The measure was called the "Hefnerkerze" (HK). The Hefnerkerze was superseded in the 1940s by the modern SI unit, the candela.
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Karl Schwarzschild Karl Schwarzschild (] ; October 9, 1873 – May 11, 1916) was a German physicist and astronomer. He was also the father of astrophysicist Martin Schwarzschild.
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Anselmus de Boodt Anselmus de Boodt or Anselmus Boëtius de Boodt (Bruges, 1550 - Bruges, 21 June 1632) was a Flemish humanist, mineralogist, physician and naturalist. Along with the German known as Georgius Agricola, de Boodt was responsible for establishing modern mineralogy. De Boodt was an avid mineral collector who travelled widely to various mining regions in Germany, Bohemia and Silesia to collect samples. His definitive work on the subject was the "Gemmarum et Lapidum Historia" (1609).
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Jean-Baptiste Biot Jean-Baptiste Biot (] ; 21 April 1774 – 3 February 1862) was a French physicist, astronomer, and mathematician who established the reality of meteorites, made an early balloon flight, and studied the polarization of light. The mineral biotite was named in his honor.
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Oliver Lodge Sir Oliver Joseph Lodge, {'1': ", '2': ", '3': ", '4': "} (12 June 1851 – 22 August 1940) was a British physicist and writer involved in the development of, and holder of key patents for, radio. He identified electromagnetic radiation independent of Hertz' proof and at his 1894 Royal Institution lectures (""The Work of Hertz and Some of His Successors""), Lodge demonstrated an early radio wave detector he named the "coherer". In 1898 he was awarded the "syntonic" (or tuning) patent by the United States Patent Office. Lodge was Principal of the University of Birmingham from 1900 to 1920.
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Joseph von Gerlach Joseph von Gerlach (April 3, 1820 – December 17, 1896) was a German professor of anatomy at the University of Erlangen. He was a native of Mainz, Rhineland-Palatinate. Gerlach was a pioneer of histological staining and anatomical micrography. In 1858 Gerlach introduced carmine mixed with gelatin as an histological stain.
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Ehrenfried Walther von Tschirnhaus Ehrenfried Walther von Tschirnhaus (or Tschirnhausen, ] ; 10 April 1651 – 11 October 1708) was a German mathematician, physicist, physician, and philosopher. He introduced the Tschirnhaus transformation and is considered by some to have been the inventor of European porcelain, an invention long accredited to Johann Friedrich Böttger but others claim porcelain had been made by English manufacturers at an even earlier date.
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Arthur R. von Hippel Arthur Robert von Hippel (November 19, 1898 – December 31, 2003) was a German American materials scientist and physicist. Von Hippel was a pioneer in the study of dielectrics, ferromagnetic and ferroelectric materials, and semiconductors and was a codeveloper of radar during World War II.
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Ernst G. Bauer Ernst G. Bauer (born 27 February 1928) is a German-American physicist. He is known for his studies in the field of surface science. His most notable contributions are his work on establishing thin film growth and nucleation mechanisms, and his invention in 1962 of the low energy electron microscope. He is currently Distinguished Research Professor Emeritus at the Arizona State University.
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Wilhelm Albert (engineer) Wilhelm August Julius Albert (24 January 1787 – 4 July 1846) was a German mining administrator, best remembered as the first person to record observations of metal fatigue.
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Heinrich G. F. Schröder Heinrich Georg Friedrich Schröder (28 September 1810 – 12 May 1885) was a German natural scientist (physicist, chemist), mathematician and educator.
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Carl Ramsauer Carl Wilhelm Ramsauer (February 6, 1879 in Osternburg, Oldenburg – December 24, 1955 in Berlin) was an internationally notable professor of physics and research physicist, famous for the discovery of the Ramsauer–Townsend effect. He pioneered the field of electron and proton collisions with gas molecules.
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Juan José Elhuyar Juan José Elhuyar Lubize (15 June 1754 – 20 September 1796) was a Spanish chemist and mineralogist, who is best known for being first to isolate tungsten with his brother Fausto Elhuyar in 1783.