Einstein Ehrenfest (12 results)

Red Cloth. Condition: Near Fine. Dust Jacket Condition: Very Good. Photographs (illustrator). First Edition. 172 Pp. Includes Einstein's 1953 Paper And Many Others. Always A Scarce Book, Altho Not Rare. Near Fine, Some Fading To Spine Cloth, Ownership Name Of Joseph L. Snider, Professor Of Physics At Oberlin. Original Clear Unprinted Dust Jacket, Shrunken, Rear Cover A Lirttle Ripply And With A Short Tear Near Center.

Soft cover. Condition: Very Good. 1st Edition. Double Issue Nov-Dec 1925. Einstein Article Is In German. Einstein Temporarily Abandons The Search For A Unified Theory. Original Grey Card Covers Printed In Black, Small "Lorentz" Printed On Label On Spine. Lightly Used, Some Loss Of Paper On Spine, Corner Crease On Front Cover Beginning To Split.

Hardcover. Condition: Fine. 1st Edition. EINSTEIN, Albert and Paul Ehrenfest. "Zur Quantentheorie der Strahlungsgleichwichts" in Zeitschrift fur Physik, 1923. pp 301-306 in the volume of 415pp. Offered in the full volume 19 bound with full volume 20 of 426pp, so altogether vi,415,vii,426pp. Bound in cloth and marbled boards. Former owner's bookplate and rubberstamp on title page, otherwise a FINE copy. Also in volume 19 are papers by Gustav Hertz, K.F. Hertzfeld, Georg Joos, W Kossel, Alfred Lande, Lise Meitner, Arnold Sommerfeld, R Seeliger, Gregor Wentzel, and just for good measure, Nicholas Raschevsky. Volume 20 contains works by W, Bothe, W, Pauli, Larl Przibram, and agfain N. Raschevsky. Lovely copy.

Condition: Good. Berlin 1923 Vieweg, Braunschweig, Springer. Original printing of this article at pp.301-306 in one complete volume of Zeitschrift fur Physik Volume 19. Included in complete volume 18. Hardcover. Octavo, 415p., 148 text figures, original contermporary binding. Many additional articles on Physics in volume as well by Hertz, Sommerfeld, Lise Meitner, Georg Joos and others. Good , cover board edges and tips worn, light spotting on cover, end papers toned.hinges not cracked; binding secure; text clean; no owner marks.

1st Edition. This paper, "On the Quantum Theory of the Radiative Equilibrium" introduces the expression "negative irradiance" ("negative Einstrahlung") for the emission of a quantum by action of irradiance (Calaprice, 121). Following his work on general relativity in 1916, Einstein continued searching for new ways in which the existence of photons might lead to observable derivations from the classical picture" (Pais, p. 413). In 1922, after six years of experimental and theoretical work, Arthur H. Compton discovered what came to be called the Compton effect; Peter Debye also discovered this independently and virtually simultaneously. Pauli then used Compton & Deby's work to extend Einstein's 1917 work to the case of radiation in equilibrium with free electrons (Pais, 414). "Pauli examined the requirements of detailed balance under Lorentz transformations and found that scattering of light by free electrons must include a term of a form which we would now call stimulated emission . . . Einstein and Ehrenfest then showed that Pauli's results could be obtained by an extension of [Einstein's] 1917 paper with the unnecessary specialization to discrete energy levels removed . . . "The core of Einstein's argument is that the scattering process should be broken into two parts: the absorption of energy from radiation of frequency 1 and the emission of energy as radiation of frequency 2" Lewis, "Einstein's derivation of Planck's radiation law," AJP, 1973, 38-44. Weil, Einstein Bibliography, 138; Pais, Subtle is the Lord, 21, 413; Lewis, "Einstein's derivation of Planck's radiation law," AJP, 1973, 38-44; Calaprice, Einstein Almanac 121. ALSO INCLUDED IN VOLUME 19 ARE PAPERS BY: Hertz, Meitner, Lande, Hertzfeld, Joos, Kossel, Lande, Sommerfeld, Seeliger, Wentzel, Raschevsky, Ebert, and Toussaint among many others. ALSO INCLUDED IN VOLUME 20 ARE PAPERS BY: Pauli, Ornstein, Raschevsky, Bothe, Walter, Hermann, and Przibram among many others. CONDITION: Berlin: Julius Springer. Volumes 19 & 20 bound as one. [iv], 415pp + [v], 426pp. NOT EX-LIBRARY. Solidly and cleanly bound in blue cloth, gilt-lettered at the spine. Bright and clean inside and out. Very good + condition.

Berlin, Julius Springer, 1923. 8vo. Bound in contemporary full cloth with gilt lettering to spine. Entire volume 19 "Zeitschrift für Physik", Library stamp to title-page and paper label pasted on to lower part of spine. Minor wear to extremities. A nice and clean copy. Pp. 301-6. [Entire volume: IV, 426 pp.]. First edition.Weil 138" Schilpp-Shields 178.The volume also contains:Meitner, Lise. Ueber eine mögliche Deutung des kontinuierlichen beta-Strahlenspektrums. Pp. 307-321.

Berlin, Julius Springer, 1923. 8vo. Bound in contemporary half cloth with gilt lettering to spine. Library stamp to front free end paper and titel page. In "Zeitschrift für Physik", bd. 19. Fine and clean. Pp. 301-6. [Entire volume: IV, 415 pp.]. First edition.Weil 138" Schilpp-Shields 178.The volume also contains:Meitner, Lise. Ueber eine mögliche Deutung des kontinuierlichen beta-Strahlenspektrums. Pp. 307-321.

In: Zeitschrift für Physik Bd. 19, S. 301-306. Hwdbd. m. goldgepr. Rtit. M. Bibl.-Einstecktasche a. hint. Innendeckel. M. mehr. St. Weil 138. Poggendorff VI, 648. Erste Ausgabe. - Der Band (insges. IV, 415 S.) enth. u.a.: Hertz, G., Über Trennung von Gasgemischen durch Diffusion in einem strömenden Gase; Fehrle, K., Über die quantitative Beziehung zwischen der sprungweisen Änderung der Atome u. den harmonischen Kompetenten ihrer Massenänderung (Poggendorff VI, 716); Würschmidt, J., Die Entmagnetisierungsfaktoren kreiszylindrischer Stäbe (Poggendorff VI, 2937). Sprache: Deutsch.

Berlin, Julius Springer, 1923. 8vo. Entire volume 19 and 20 of "Zeitschrift für Physik" bound in contemporary black half cloth with gilt title to spine. Library stamp to title-page and paper label pasted on to lower part of spine. Minor wear to extremities. A nice and clean copy. Pp. 301-6. [Entire volume: IV, 426 pp.]. First edition.Weil 138" Schilpp-Shields 178.The volume also contains:Meitner, Lise. Ueber eine mögliche Deutung des kontinuierlichen beta-Strahlenspektrums. Pp. 307-321.Pauli, W. Zur Frage der Zuordnung der Komplexstrukturterme in starken und in schwachen äusseren Feldern. Pp. 371-88.

In: Zeitschrift für Physik Bd. 19, S. 301-306. Doppelbd. m. 20 in Hlwd. m. hs. Rtit. St. verso Tit. Rostige Klammerbindung an einigen Stellen sichtbar. Weil 138. Poggendorff VI, 648. Erste Ausgabe. - Die Bände (insges. IV, 415, V, 426 S.) enth. u.a.: Hertz, G., Über Trennung von Gasgemischen durch Diffusion in einem strömenden Gase; Fehrle, K., Über die quantitative Beziehung zwischen der sprungweisen Änderung der Atome u. den harmonischen Kompetenten ihrer Massenänderung (Poggendorff VI, 716); Würschmidt, J., Die Entmagnetisierungsfaktoren kreiszylindrischer Stäbe (Poggendorff VI, 2937); Bothe, W., Die räumliche Energieverteilung in der Hohlraumstrahlung UND: Über eine neue Sekundärstrahlung der Röntgenstrahlen (II. Mitteilung) - (Poggendorff VI, 290); Strum, L., Zur Frage nach der Überlichtgeschwindigkeit in der speziellen Relativitätstheorie; Pauli, W.jr., Zur Frage der Zuordnung der Komplexstrukturterme in starken u. in schwachen äußern Feldern (Poggendorff VI, 1963); Woronkoff, G.P. u. G.J. Pokrowski, Über die selektive Reflexion des Lichtes an diffus reflektierenden Körpern (Poggendorff VI, 2929). Sprache: Deutsch.

Einstein, Albert (1879-1955) and Paul Ehrenfest (1880-1933). Zur Quantentheorie des Strahlungsgleichgewichts. Offprint from Zeitschrift für Physik 19 (1923). 301-306pp. Original printed self-wrappers. 230 x 157 mm. Light toning but very good. First Edition, Offprint Issue. In 1916, after publishing his great work on general relativity, Einstein returned to the question of blackbody radiation. In November 1916 he wrote to his friend Besso that "a splendid light has dawned on me about the absorption and emission of radiation" (quoted in Pais, p. 405), one that led him to a new derivation of Planck's radiation law and convinced him of the reality of light-quanta (photons). After publishing these results in three papers, culminating with the famous "Zur Quantentheorie der Strahlung" (1917), Einstein kept looking for "new ways in which the existence of photons might lead to observable derivations from the classical picture" (Pais, p. 413). He found none until 1923, when Arthur Compton and Peter Debye independently derived the relativistic kinematics for the scattering of a photon off an electron at rest. The work of Compton and Debye led Wolfgang Pauli to extend Einstein's work of 1917 to the case of radiation in equilibrium with free electrons (see Pais, p. 414n). "Pauli examined the requirements of detailed balance under Lorentz transformations and found that scattering of light by free electrons must include a term of a form which we would now call stimulated emission . . . Einstein and Ehrenfest then showed that Pauli's results could be obtained by an extension of [Einstein's] 1917 paper with the unnecessary specialization to discrete energy levels removed . . . The core of Einstein's argument is that the scattering process should be broken into two parts: the absorption of energy from radiation of frequency 1 and the emission of energy as radiation of frequency 2" (Lewis, p. 42). Lewis, "Einstein's derivation of Planck's radiation law," American Journal of Physics 41 (1973): 38-44. Pais, Subtle is the Lord, ch. 21. Weil, Albert Einstein Bibliography, 138. .

(23 x 16 cm). IV, 398 S. Mit 115 Abbildungen. Halbleinwandband der Zeit. Zwei erste Ausgaben. - Titel verso gestempelt. Einband gering berieben, sonst sauber und gut erhalten. - Weil 121 und 122. - Der Band enthält weiter Arbeiten von L. Meitner, A. Sommerfeld und W. Heisenberg, E. Schrödinger und M. Born.