franck hertz (10 risultati)

80 S. einige Fig. Br. *sehr gutes Expl.*.

(22,5 x 15,5 cm). SS. (201)-232. Mit Abbildungen. Original-Broschur. Erste Ausgabe dieser wichtigen Arbeit über die Erklärung der Intensität der Glimmentladung mit Hilfe der Gesetze über den Energieaustausch zwischen langsamen Elektronen und Gasmolekülen. - Franck (1882-1964) und Hertz (1887-1974) erhielten 1926 - rückwirkend für 1925 - für die Entdeckung der Stoßgesetze zwischen Elektronen und Atomen den Nobelpreis für Physik. - Wohlerhalten. - DSB 5, 117.

(22 x 15 cm). SS. (349)-394/ SS. (571)-620. Mit Abbildungen. Rückenbroschuren. Erste Ausgabe dieser beiden wichtigen Vorarbeiten für das bedeutende Experiment zur Bestätigung der Bohrschen Quantenhypothese. - Franck (1882-1964) und Hertz (1887-1974) erhielten 1926 - rückwirkend für 1925 - für die Entdeckung der Stoßgesetze zwischen Elektronen und Atomen den Nobelpreis für Physik. "These experiments are rightly regarded as the first decisive proof of the reality of the quantized energy levels that had just been postulated by Niels Bohr" (DSB). - Sauber und gut erhalten. - DSB 5, 117.

ANREGUNG VON QUANTENSPRÜNGEN DURCH STÖßE von Dr. J. Franck und Dr. P. Jordan. Verlag Julius Springer Berlin, 1. Auflage 1926, ERSTAUSGABE, 312 SS. gebunden (Hardcover 8°) mit 51 Abbildungen, gut erhalten (NOBELPREISTRÄGER - Autor JAMES FRANCK (1882-1964) deutscher Experimentalphysiker, der später als jüdischer Flüchtling vor den Nationalsozialisten in die USA emigrierte und die amerikanische Staatsbürgerschaft annahm. Er erhielt 1925 mit Gustav Hertz den Nobelpreis. / PASQUAL JORDAN (1902-80) deutscher theoretischer Physiker und Politiker. Pascual Jordan wirkte maßgeblich an der Entwicklung und mathematischen Formulierung der Quantenmechanik mit. Darüber hinaus begründeten seine Arbeiten die Quantenfeldtheorie . / Mitherausgeber der Reihe STRUKTUR DER MATERIE IN EINZELDARSTELLUNGEN war MAX BORN (1882-1970, deutscher Mathematiker und Physiker . Für grundlegende Beiträge zur Quantenmechanik wurde er 1954 mit dem Nobelpreis für Physik ausgezeichnet.).

Braunschweig, Friedr. Vieweg & Sohn, 1914. No wrappers. In: "Verhandlungen der deutschen Physikalischen Gesellschaft im Jahre 1914. Hrsg. von Karl Scheel", 16. jahrgang, Nr. 10 a. 11. Pp. (437-) 494 a. (495-) 566. (Entire issues offered). With titlepage to 16. Jahrgang. The papers: pp. 457-467 a. pp. 512-517, 2 textillustr. First apperance of these two groundbreaking papers constituting the famous "Franck-Hertz Experiments" giving the first experimental determination of Planck's constant not using blackbody radiation."Thus, the experiments by Franck and hertz were later considered as a new and independent support not only of Planck's quantum theory and Einstein's light-quantum hypothesis, but also of Bohr's theory of the atom with sationary states of discrete energies. In 1926 Franck and Hertz were awardedthe Nobel prize for 1925."(Siegmund Brandt "The Harvest of a century", Episode 25, p. 102).The Nobel Prize were given "for their discovery of the laws governing the impact of an electron upon an atom".

1st Edition. FIRST EDITION, FULL VOLUME, OF THE FRANCK-HERTZ EXPERIMENT: THE FIRST ELECTRICAL MEASUREMENT TO CLEARLY SHOW THE QUANTUM NATURE OF ATOMS - PROOF OF THE QUANTIZED MODEL OF THE BOHR ATOM & OF PLANCK'S QUANTUM THEORY. Note that this volume includes both the first and second Franck-Hertz experiment. In the first they demonstrate that atoms can only absorb and be excited by specific amounts of energy; in the second experiment performed the same year, they demonstrate that the frequency of the light emitted following the collision of electrons with mercury atoms corresponds precisely with the energy lost by the electrons in the collision. Franck and Hertz received the Nobel Prize for this work, specifically, "for their discovery of the laws governing the impact of an electron upon an atom" (Nobel Prize Committee). Of equal import, this volume also contains a paper by Einstein in which he uses the light quantum hypothesis to give new derivations of Planck's radiation law and Nernst's third law of thermodynamics. His "proofs introduced the quantum hypothesis" (Calaprice, The Einstein Almanac, 40). In 1914, James Franck and Gustav Hertz were working together in the Physics Institute of Berlin and were "particularly interested in ionization, i.e., in the process in which an electron is removed from an atom" (The Harvest of a Century", p. 102-103). The experiment they devised, now known commonly as the Franck-Hertz experiment is "a vivid illustration of the quantization of energy" that relied on methodology so simple "that it is now carried out regularly by undergraduates. They accelerated electrons through a low-pressure gas of mercury. When the electrons' energy reach the energy of a stationary state of mercury they gave up a quantum of energy to the mercury, resulting in a stepwise shape to the curve of current through the apparatus. This demonstrated that atoms could absorb energy only in discrete amounts" (Peacock, The Quantum Revolution, 40). "[Franck and Hertz] had not only shown for the first time that electrons lose their kinetic energy to mercury atoms in energy quanta, but also that these energy quanta are equal to the energy of the light emitted by the same atoms if interpreted with Einstein's light-quantum hypothesis.This was the first experimental determination of Planck's constant not using blackbody radiation" (Brandt, 103). CONDITION & DETAILS: Braunschweig: Friedr. Vieweg & Sohn. 8vo. Unobtrusive stamp on front paste down and title page. In-text figures throughout. Tightly bound in leather over marbled paper boards; gilt-lettered and tooled at the slightly faded and spotted spine (which looks worse in the image due to the bright light than it does to the eye). Unusually beautiful marbled paper edges. Bright and very clean throughout. Near fine.

Braunschweig, Friedr. Vieweg & Sohn, 1914. Lex8vo. Contemp hcloth, gilt spine. Lower spine end a bit frayed, otherwise very fine. In: "Verhandlungen der deutschen Physikalischen Gesellschaft im Jahre 1914", 16. Jahrgang. IX,1072 pp. Franck & Hertz' papers: pp. 457-467 a. 512-517, textillustr. Fine and clean. First apperance of the famous Franck-Hertz Experiment which is considered as a new and independent support, not only of Planck's quantum theory and Einstein's light-quantum hypothesis but also of Bohr's theory of the atom with stationary states of discrete energies.Franck and Hertz were awarded the Nobel Prize in Physics in 1925 for this work and Franck concluded his Nobel lecture with the words "We know only to well that we owe the wide recognition that our work received to contact with the great concepts and ideas of M. Planck and in particular Niels Bohr."In their famous experiments, Franck and Hertz' showed that electrons could impart energy to a mercury atom only if they had a kinetic energy exceeding 4.9 ev., and that exactly this quantum of energy was taken up by the mercury atom, causing it to emit light of the resonance line Å 2537. It was the first direct proof of the quantized nature of the energy transfer and of the connection of the quantum DeltaE of energy with the frequency p = DeltaE/h of the light emitted as the result of the transfer. These experiments are rightly regarded as the first decisive proof of the reality of the quantized energy levels that had just been postulated by Niel?s Bohr." (DSB).See: Siegmund Brandt "The Harevest of a Century. Discoveries of Modern Physics in 100 Episodes", Episode 25, The Franck-Hartz Experiment (1914), pp. 102-104.The volume contains another importent paper ALBERT EINSTEIN "Beiträge zur Quantentheorie", pp. 820-828. First edition. "In this paper. two considerations are given which are interrelated by a common goal, inasmuch as it is attempted to derive two of the most importent achievementss of quantum theory, viz. Planck's radiation law and Nernst's third law of thermodynamics, in a new manner. The proofs do not involve Boltzmann's equation and are thus based enterely on macroscopic thermodynamics. They do introduce, however, the quantum hupothesis. (Einstein points out that the alleged 'proofs' which try to derive the theorem of Nernst from the mere fact that the heat capacity of all substances goes to zero at absolute zero temterature, are not genuine)." (Cornelius Lanczos).Weil No 67.

(21 x 14,5 cm). SS. (23)-56. Mit Abbildungen. Rückenbroschur. Erste Ausgabe dieser wichtigen Vorarbeit für das bedeutende Experiment zur Bestätigung der Bohrschen Quantenhypothese. - Franck (1882-1964) und Hertz (1887-1974) erhielten 1926 - rückwirkend für 1925 - für die Entdeckung der Stoßgesetze zwischen Elektronen und Atomen den Nobelpreis für Physik. - Wohlerhalten. - DSB 5, 117.

Brief (1 S. 4°, Durchschlag auf dünnem Papier) mit Ort, Datum, eigenhändiger Unterschrift signiert Berlin-Zehlendorf, 24.VIII.1942 "Lieber Kamerad ! Ich habe die schöne Aufgabe übernommen, die bei der Wehrmacht stehenden jetzigen und künftigen Studenten der Physik unserer Hochschule zu betreuen." BEILAGE : Orig.-Briefumschlag dazu an Obgfr. Horst Jahnke, Lehrgang f. Flugzeug Bildpersonal.

Signed FDC clipping & card (with an affixed photograph of Hertz), 3,25 x 3,5 (clipping) & 2,5 x 3,75 (card), the FDC clipping signed by James Franck in dark ink "James Franck" & the card signed by Gustav Ludwig Hertz in blue ink "Gustav Hertz", both attractively mounted (removable) for fine display with a composite photograph of the Franck-Hertz experiment (altogether 8,25 x 11,75 inch), the FDC with trimmed to the lower edge - overall in fine to very fine condition.