Ångström anders jonas (19 Ergebnisse)

Zustand: New. In English.

Zustand: New. In English.

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

Zustand: New. In English.

Zustand: New. In English.

Taschenbuch. Zustand: Neu. Neuware - This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Taschenbuch. Zustand: Neu. Neuware - Ce livre présente les résultats d'une étude sur la polarisation et la double réfraction des cristaux à trois axes obliques, effectuée par A. J. Angström. Les recherches ont été publiées dans les Acta Reg Soc Upsal, une revue scientifique suédoise.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Zustand: New.

Buch. Zustand: Neu. Neuware - This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Buch. Zustand: Neu. Neuware - Ce livre présente les résultats d'une étude sur la polarisation et la double réfraction des cristaux à trois axes obliques, effectuée par A. J. Angström. Les recherches ont été publiées dans les Acta Reg Soc Upsal, une revue scientifique suédoise.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

Zustand: New.

Zustand des Schutzumschlags: Soft cover. First edition. A FOUNDING WORK OF SPECTROSCOPY. First edition, a very fine copy in unrestored original printed wrappers, and rare thus, of one of the founding works of spectroscopy in which Ångström demonstrated the presence of hydrogen and a number of other elements in the sun; the atlas contains his great map of the solar spectrum. Since the plates of the atlas were simply laid in to the printed wrappers (and not sewn), the wrappers were often lost or damaged; it is rare to find these wrappers present and in fine condition as in our copy. In his Nobel Prize lecture, Arthur Schawlow (who shared the 1981 prize for his contributions to the development of laser spectroscopy) wrote: "Fraunhofer had charted the dark lines in the spectrum of the Sun, and had measured their wavelengths. But it was Ångström who first identified some of these lines as corresponding to bright lines emitted by particular substances . Most importantly, he showed the red line of hydrogen." "After 1861 Ångström intensively studied the spectrum of the sun, noticing the presence of hydrogen in the solar atmosphere and confirming the probable existence there of a number of other elements. In 1868 he published the monumental Recherches sur le Spectre Solaire, which contained an atlas of the solar spectrum with measurements of the wavelengths of approximately a thousand lines determined by the use of diffraction gratings. Ångström expressed his results in units of one ten-millionth of a millimetre - a unit of length that has been named the Ångström unit in his honor. In order to have a precise basis for the new science of spectroscopy, accepted standards were needed . In 1861 Kirchhoff made a map of the solar spectrum and labeled lines with the corresponding scale readings of his own prismatic instrument. These rapidly became the almost universally accepted manner of designating spectral lines, but they were inconvenient because each observer had to correlate his own readings with those of the arbitrary Kirchhoff scale. Ångström's wavelength measurements provided a more precise and convenient reference and, after 1868, became a competing authoritative standard" (DSB). Spectroscopic studies were crucial to Max Planck's explanation of blackbody radiation, Albert Einstein's explanation of the photoelectric effect, and Niels Bohr's explanation of atomic structure. Spectra are used to detect, identify and quantify information about the chemical composition of substances in the laboratory, as well as in astronomy where they enable the determination of the chemical composition and physical properties of celestial objects. "By the time that Ångström began his studies on spectral analysis at Uppsala, a fair amount of information was known, more experimentally than theoretically, about the solar spectrum. Optics had become a subject of intensive study during the first half of the nineteenth century, but there was little interest in identifying the cause of the lines on the spectra and in appreciating their structural implications . no significant progress had been made in the eighteenth century since Newton's classic investigations on sunlight and his experiments with prisms and reflecting telescopes . Newton failed to note that the light from the sun is not perfectly homogeneous; instead it was [William Hyde] Wollaston (1766-1828) who first discovered this effect by observing the rays of sunlight admitted through a narrow slit in a window blind. Wollaston's initial observation of seven dark lines, followed by [Joseph von] Fraunhofer's work, which included a greater number of lines in the solar spectrum, lies at the root of all subsequent works, including that of Ångström. The studies of these pioneers had shown that whereas sunlight differed from ordinary white light in having a spectrum of dark lines, colored light differed from the same white light in having a spectrum in which bright lines could be seen. Ångström familiarized himself with all of this work ." (Reif-Acherman). "By the time he was appointed regular professor of physics, in 1858, Ångström had already published one of his two most famous contributions to the new scientific field of spectroscopy. The paper Optical Researches was published in Swedish in 1853 and in English and German two tears later. In it Ångström presented, in an unsystematic fashion, a number of experimental results concerning the absorption of light from electrical sparks in gases. He also made theoretical interpretations indicating, among other things, that gases absorb light of the same wavelengths that they emit when heated, and suggesting, somewhat obliquely, that the Fraunhofer lines could be explained in this way. "During the priority disputes that followed Gustav Kirchhoff's publication of the law of absorption and the explanation of the Fraunhofer lines [and his map of the solar spectrum] around 1860, Ångström and his collaborator at Uppsala University, Robert Thalén (1827-1905), vigorously defended the Swede's priority. Their claims were to some extent recognized also in Britain when the Royal Society elected Ångström foreign member in 1870 and awarded him the Rumford Medal two years later. These honors were also given in recognition of Ångström's other important spectroscopic work, an atlas of the solar spectrum published in 1868" (Biographical Encyclopedia of Astronomers). "In 1868, Ångström published his most important work, 'Recherches sur le Spectre Solaire', in Uppsala. The essay, a compendium of all of his experiments, received considerable international attention and became the standard of spectroscopy for at least a quarter of a century . Because of its considerable greater dispersive power [i.e., that of Ångström's spectrometer], the information included in Ångström's map surpassed the information found in Kirchhoff's map, and the number of visible bands rose accordingly . Several dark bands on Kirchhoff's map resolved themselves into arrays of tightly packed lines . The measurements give the.…

Uppsala, C.A. Leffler, 1862. 4to. Later blank boards. Uncut. Offprint from "Nova Acta Reg.Soc. Sc. Ups.". 10 pp. and 1 folded plate. First edition. In this paper Ångström deduces the mean period of Halley's Comet by a statistical approach. From his analysis he discovered that the average time between perihelions was 76.93 years and found that thsi period varied in a cyclical manner.Ångström was one of the early formulators of the science of modern spectroscopy" he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.…

4:o. (2), 48 s. Samtida blankt omslag, loss i ryggen, delvis med fläck i margnalen. Deltitelbladen finns inte med i detta exemplar Främre omslag med dedikation från författaren till prof. Edlund.

Stockholm, (1851). Uncut in orig. blue blank wrappers. Wrappers a bit frayed.Offprint from "Kungl. Svenska Vetenskaps Akademiens handlingar". 1850. II. Pp. (425-)461 a. 2 plates. Wrappers and plates loose. First editon. Importent pioneer work in crystallography. The papers topic is the exact nature of the relation between the various axes of a crystal, the axes of figure, of elasticity, of electrical conductivity, the thermal, the optic, and the magnetic axes.…

Leipzig, Johann Ambrosius Barth, 1862. Without wrappers as issued in "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff", Vierte Reihe Bd. 27 (117), Stück Zwei, No. 10. The entire issue offered. Titlepage to vol. 27. Pp. 193-352 a. 1 engraved plate. Ångströms paper: pp. 290-302. First appearance in German of Ångström's famous paper in which he announced the discovery of hydrogen in the atmosphere of the sun and in which he also confirmed the probable existence of of other elements there. The paper appeared in "Oefversigt af K. Vet. Acad. Förhandl." in 1861. The German paper here is expanded. At the same time it was translated into English and publishe as "On the Fraunhofer Lines Visible in the Solar Spectrum".Ångström was one of the early formulators of the science of modern spectroscopy" he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.…

Uppsala, Wahlström & C., 1848-54. 4to. Sewn as issued. Uncut. (2),16,(2),17-24,(2),25-32,(2),33-40,(2),41-48 pp. First edition of Ångström's early work on thermometrical phenomena.Ångström was one of the early formulators of the science of modern spectroscopy he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.…

Akademisk afhandling . under inseende af Henr. Falck . för philosophiska graden författad och till offentlig granskning framställd af And. Jon. Ångström. Upsala 1839. (2),10, (4),1-8,(2),9-20. Disbound. *Ångströms doctorial dissertation, first the Swedish one for Mag. Henr. Falck and then the latin version with Petrus Abrah. Govenius and Ingialdas Rotzén as respondents.[#210141].…

Uppsala, Regiae Academiae Typographi, 1839. Small 4to. Sewn as issued, uncut. (4),1-10,11-20 pp. Fine and clean. Printed on thick blue paper. First edition of Ångströms scarce doctoral dissertation, dealing with the optics of conical refraction.Ångström was one of the early formulators of the science of modern spectroscopy he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.…