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355 results on '"Hon, Giora"'

9. Did Simon Marius observe Jupiter's satellites on January 8, 1610? An exercise in computation

Author

Zik, Yaakov, Hon, Giora, and Manulis, Ilan

Subjects
Physics - History and Philosophy of Physics
Abstract

The question, Did Simon Marius (1573-1625) observe Jupiter's satellites on January 8, 1610 (December 29, 1609 in the Julian calendar) is moot, for he did not disclose his research method and the instrument he used. To resolve this issue we apply astronomical codes and evaluate the visual performance of a replica of the telescope that Galileo Galilei (1564-1642) had used., Comment: 14 pages, 5 figures, 2 tables

Published
2020

10. Claudius Ptolemy and Giambattista Della Porta: Two Contrasting Conceptions of Optics

Author

Zik, Yaakov and Hon, Giora

Subjects
Physics - History and Philosophy of Physics
Abstract

We address the phenomenon of reflection in concave spherical mirror in two contrasting approaches to optics. In his Optics (ca.165) Ptolemy applied the cathetus principle as a regulative means for explaining qualitatively effects related to visual perception in concave spherical mirror. By contrast, Della Porta's study of reflection in concave spherical mirror in Bk. 17, Ch. 4 of his Magia naturalis (1589) and De refractione (1593), was based on the assumption that there is a reciprocal relation between reflection in concave spherical mirror and refraction in glass sphere. We juxtapose these two studies and draw several philosophical lessons from the comparison between these two practices with a view to throwing into relief the fundamental differences in their respective conceptions of optics., Comment: 24 pages, 22 figures

Published
2019

13. The Roles of Thomson and Rutherford in the Birth of Atomic Physics:The Interaction of Experiment and Theory.

Author

Hon, Giora and Goldstein, Bernard R.

Subjects
*ATOMIC physics, *ATOMIC interactions, *ATOMIC models, *PHYSICS, *ELECTRONS, *ELECTRON scattering
Abstract

The discovery of the electron in 1897 by J. J. Thomson meant that the atom was no longer the smallest unit of matter. This led to a set of responses both experimental and theoretical which consolidated a new branch of physics—atomic physics. What were the tools available at the time to address atomic physics and how were they deployed? The research begins with Thomson who sought to describe a structure of the atom that accommodates both mechanical and electromagnetic properties, but he had little experimental data to base it on. It was indeed an experimental finding which paved the way for the modern conception of the structure of the atom—Rutherford's scattering experiment. A complex relation between theory and experiment in a new domain of physics is uncovered. While the revolutionary discovery of the electron was the result of a classical propagation experiment, the discovery of the concentrated charge at the center of the atom was an outcome of a scattering experiment—a bombardment technique. This technique has turned out to be the hallmark of experimental atomic physics. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Constitution and model. The quantum theory of Bohr and imagining the atom

Author

Hon, Giora and Goldstein, Bernard R.

Subjects
Physics - History and Philosophy of Physics
Abstract

The quantum theory of Bohr has roots in the theories of Rutherford and J. J. Thomson on the one hand, and that of Nicholson on the other. We note that Bohr neither presented the theories of Rutherford and Thomson faithfully, nor did he refer to the theory of Nicholson in its own terms. The contrasting attitudes towards these antecedent theories is telling and reveals the philosophical disposition of Bohr. We argue that Bohr intentionally avoided the concept of model as inappropriate for describing his proposed theory. Bohr had no problem in referring to the works of others as 'models', thus separating his theory from previous theories. He was interested in uncovering 'a little piece of reality'., Comment: 11 pages

Published
2014

17. Galileo knowledge of optics and the functioning of the telescope revised

Author

Zik, Yaakov and Hon, Giora

Subjects
Physics - History and Philosophy of Physics
Abstract

What are the historical evidence concerning the turning of the spyglass into an astronomical instrument, the telescope? In Sidereus Nuncius and in his private correspondence Galileo tells the reader what he did with the telescope, but he did not disclose the existence of a theory of the instrument. Still, the instruments which Galileo produced are extant and can be studied. With replicas of Galileo's telescopes that magnify 14 and 21 times, we have simulated and analyzed Galileos practices as he reported them in Sidereus Nuncius. On this ground, we propose a new solution to this old problem. We establish the knowledge of optics that Galileo had as it can be read off from the telescopes he constructed and the way he put them to use. Galileo addressed optical difficulties associated with illumination, resolution, field of view, and magnification. His optical knowledge was well thought through, originated as it did in a radically new optical framework.

Published
2013

31. Introduction: Mapping 'Going Amiss'

Author

Hon, Giora, Schickore, Jutta, Steinle, Friedrich, Cohen, Robert S., editor, Renn, Jürgen, editor, Gavroglu, Kostas, editor, Hon, Giora, editor, Schickore, Jutta, editor, and Steinle, Friedrich, editor

Published
2009
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33. Leonhard Euler (1707–1783) and Immanuel Kant (1724–1804): 'Revolutions' That Did Not Happen

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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34. New Applications of Symmetry in Mathematics and Physics: 1788–1815

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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35. New Aesthetic Sensibilities in Italian and French Architecture

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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36. The Treatment of Symmetry in Natural History (1738–1815)

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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37. Legendre’s Revolutionary Definition of Symmetry as a Scientific Concept (1794)

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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38. Introduction

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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39. The Ancient Concept of Symmetry in Scientific Contexts in Early Modern Times and Its Association with Harmony

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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40. The Mathematical Path

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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41. The Aesthetic Path

Author

Hon, Giora, Goldstein, Bernard R., Buchwald, Jed Z., editor, Gray, Jeremy, editor, Kingsland, Sharon, editor, Bos, Henk, editor, Feingold, Mordechai, editor, Franklin, Allan D., editor, Gavroglu, Kostas, editor, Grafton, Anthony, editor, Levere, Trevor, editor, Lützen, Jesper, editor, Newman, William, editor, Principe, Lawrence, editor, Renn, Jürgen, editor, Roland, Alex, editor, Shapino, Alan, editor, Siraisi, Nancy, editor, Swerdlow, Noel, editor, Hon, Giora, and Goldstein, Bernard R.

Published
2008
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45. Does a Living System Have a State?

Author

Hon, Giora, Symons, John, editor, Van Dalen, Dirk, editor, Davidson, Donald, editor, Kuipers, Theo A. F., editor, Suppes, Patrick, editor, Woleński, Jan, editor, Rojszczak, Artur, editor, Cachro, Jacek, editor, and Kurczewski, Gabriel, editor

Published
2003
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