47 found
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  1. Presentism and Relativity. [REVIEW]Yuri Balashov & Michel Janssen - 2003 - British Journal for the Philosophy of Science 54 (2):327-346.
    In this critical notice we argue against William Craig's recent attempt to reconcile presentism (roughly, the view that only the present is real) with relativity theory. Craig's defense of his position boils down to endorsing a ‘neo-Lorentzian interpretation’ of special relativity. We contend that his reconstruction of Lorentz's theory and its historical development is fatally flawed and that his arguments for reviving this theory fail on many counts. 1 Rival theories of time 2 Relativity and the present 3 Special relativity: (...)
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  2. Of Pots and Holes: Einstein's Bumpy Road to General Relativity.Michel Janssen - unknown
    Readers of this volume will notice that it contains only a few papers on general relativity. This is because most papers documenting the genesis and early development of general relativity were not published in Annalen der Physik . After Einstein took up his new prestigious position at the Prussian Academy of Sciences in the spring of 1914, the Sitzungsberichte of the Berlin academy almost by default became the main outlet for his scientific production. Two of the more important papers on (...)
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  3. Drawing the Line Between Kinematics and Dynamics in Special Relativity.Michel Janssen - 2009 - Studies in History and Philosophy of Science Part B 40 (1):26-52.
    In his book, Physical Relativity, Harvey Brown challenges the orthodox view that special relativity is preferable to those parts of Lorentz's classical ether theory it replaced because it revealed various phenomena that were given a dynamical explanation in Lorentz's theory to be purely kinematical. I want to defend this orthodoxy. The phenomena most commonly discussed in this context in the philosophical literature are length contraction and time dilation. I consider three other phenomena of this kind that played a role in (...)
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  4. COI Stories: Explanation and Evidence in the History of Science.Michel Janssen - 2002 - Perspectives on Science 10 (4):457-522.
    This paper takes as its point of departure two striking incongruities between scientiªc practice and trends in modern history and philosophy of science. (1) Many modern historians of science are so preoccupied with local scientiªc practices that they fail to recognize important non-local elements. (2) Many modern philosophers of science make a sharp distinction between explanation and evidence, whereas in scientiªc practice explanatory power is routinely used as evidence for scientiªc claims. I draw attention to one speciªc way in..
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  5. Reconsidering a Scientific Revolution: The Case of Einstein 6ersus Lorentz.Michel Janssen - unknown
    The relationship between Albert Einstein’s special theory of relativity and Hendrik A. Lorentz’s ether theory is best understood in terms of competing interpretations of Lorentz invariance. In the 1890s, Lorentz proved and exploited the Lorentz invariance of Maxwell’s equations, the laws governing electromagnetic fields in the ether, with what he called the theorem of corresponding states. To account for the negative results of attempts to detect the earth’s motion through the ether, Lorentz, in effect, had to assume that the laws (...)
     
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  6.  81
    Pascual Jordan's Resolution of the Conundrum of the Wave-Particle Duality of Light.Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B 39 (3):634-666.
    In 1909, Einstein derived a formula for the mean square energy fluctuation in blackbody radiation. This formula is the sum of a wave term and a particle term. In a key contribution to the 1926 Dreim¨.
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  7. From Classical to Relativistic Mechanics: Electromagnetic Models of the Electron.Michel Janssen - unknown
    “Special relativity killed the classical dream of using the energy-momentumvelocity relations as a means of probing the dynamical origins of [the mass of the electron]. The relations are purely kinematical” (Pais, 1982, 159). This perceptive comment comes from a section on the pre-relativistic notion of electromagnetic mass in ‘Subtle is the Lord . . . ’, Abraham Pais’ highly acclaimed biography of Albert Einstein. ‘Kinematical’ in this context means ‘independent of the details of the dynamics’. In this paper we examine (...)
     
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  8.  53
    The Twins and the Bucket: How Einstein Made Gravity Rather Than Motion Relative in General Relativity.Michel Janssen - 2012 - Studies in History and Philosophy of Science Part B 43 (3):159-175.
    In publications in 1914 and 1918, Einstein claimed that his new theory of gravity in some sense relativizes the rotation of a body with respect to the distant stars and the acceleration of the traveler with respect to the stay-at-home in the twin paradox. What he showed was that phenomena seen as inertial effects in a space-time coordinate system in which the non-accelerating body is at rest can be seen as a combination of inertial and gravitational effects in a space-time (...)
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  9.  38
    On the Verge of Umdeutung in Minnesota: Van Vleck and the Correspondence Principle.Anthony Duncan & Michel Janssen - unknown
    In October 1924, The Physical Review, a relatively minor journal at the time, published a remarkable two-part paper by John H. Van Vleck, working in virtual isolation at the University of Minnesota. Van Vleck used Bohr's correspondence principle and Einstein's quantum theory of radiation to find quantum formulae for the emission, absorption, and dispersion of radiation. The paper is similar but in many ways superior to the well-known paper by Kramers and Heisenberg published the following year that is widely credited (...)
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  10.  10
    The Trouton Experiment, E= Mc 2, and a Slice of Minkowski Space-Time.Michel Janssen - 2003 - In A. Ashtekar (ed.), Revisiting the Foundations of Relativistic Physics. pp. 27--54.
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  11.  90
    'No Success Like Failure ...': Einstein's Quest for General Relativity, 1907-1920.Michel Janssen - unknown
    This is the chapter on general relativity for the Cambridge Companion to Einstein which I am co-editing with Christoph Lehner.
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  12. Appendix A: Special Relativity.Michel Janssen - unknown
    1.1. The two postulates of special relativity and the tension between them. When Einstein first presented what came to be known as special relativity, he based the theory on two postulates or principles, called the “relativity postulate” or “relativity principle” and the “light postulate.” Both postulates are supported by a wealth of experimental evidence. The combination of the two, however, appears to lead to contradictions. To avoid such contradictions, Einstein argued, we need to change some of our fundamental ideas about (...)
     
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  13. 19Th Century Ether Theory..Michel Janssen - unknown
    Scientists working on the wave theory of light in the 19 th century took it for granted that there had to be a medium for the propagation of light waves. This medium was called the luminiferous [= “light carrying”] ether. One of the central questions about this medium concerned its state of motion. There were two options: (1) The ether is completely undisturbed by matter moving through it (stationary or immobile ether); (2) Matter drags along the ether in its vicinity (...)
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  14.  7
    Kuhn Losses Regained: Van Vleck From Spectra to Susceptibilities.Charles Midwinter & Michel Janssen - unknown
    We discuss the early career of John H. Van Vleck, one of the earliest American quantum theorists who shared the 1977 Nobel prize with his student Philip W. Anderson and Sir Nevill Mott. In particular, we follow Van Vleck's trajectory from his 1926 Bulletin for the National Research Council on the old quantum theory to his 1932 book, The Theory of Electric and Magnetic Susceptibilities. We highlight the continuity of formalism and technique in the transition from dealing with spectra in (...)
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  15. What Did Einstein Know and When Did He Know It? A Besso Memo Dated August 1913.Michel Janssen - unknown
    If through rotation of a hollow sphere one produces a Coriolis field inside of it, then a centrifugal field is produced [...] that is not the same as the one that would occur in a rotating rigid system with the same Coriolis field. One can therefore not think of rotational forces as produced by the rotation of the fixed stars ….
     
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  16.  46
    Review: Presentism and Relativity. [REVIEW]Yuri Balashov & Michel Janssen - 2003 - British Journal for the Philosophy of Science 54 (2):327-346.
    In this critical notice we argue against William Craig's recent attempt to reconcile presentism (roughly, the view that only the present is real) with relativity theory. Craig's defense of his position boils down to endorsing a 'neo-Lorentzian interpretation' of special relativity. We contend that his reconstruction of Lorentz's theory and its historical development is fatally flawed and that his arguments for reviving this theory fail on many counts.
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  17. Einstein: The Old Sage and the Young Turk.Michel Janssen - unknown
    There is a striking difference between the methodology of the young Einstein and that of the old. I argue that Einstein’s switch in the late 1910s from a moderate empiricism to an extreme rationalism should at least in part be understood against the background of his crushing personal and political experiences during the war years in Berlin. As a result of these experiences, Einstein started to put into practice what, drawing on Schopenhauer, he had preached for years, namely to use (...)
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  18. The Twins and the Bucket: How Einstein Made Gravity Rather Than Motion Relative in General Relativity.Michel Janssen - 2012 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 43 (3):159-175.
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  19.  91
    S Hdrtly After the Publicatlon Qf the Field Equatidns of General Relativity In.Michel Janssen - unknown
    A substantial part of my reconstruction can aheady be found, in a very condensed form, in the annotauon for the relevant pages of the Einstein-Besso manuscript in Einstein CP4: doc. 14, pp. [41— 42]. The letter to Freundlich and other correspondence from the period 1915 — 1917 that I drew on for this paper appear in Einstein CPS. I wrote this paper in the context of a larger project of the Maxplanck-Institut flir Wissenschaflsgeschichte which aims at giving the most detailed (...)
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  20. Why Einstein Introduced the Cosmological Constant.Michel Janssen - unknown
    With the discovery that the universe is expanding at an accelerating rate, Einstein’s cosmological constant, which he once supposedly called his biggest blunder, is making a remarkable comeback. Einstein’s introduction of this constant had little to do with cosmology. It was part of yet another failed attempt to eliminate absolute space from physics. It took the Dutch astronomer Willem de Sitter only a few days to blow the idea out of the water. It took Einstein over a year to concede (...)
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  21.  80
    Einstein's First Systematic Exposition of General Relativity.Michel Janssen - unknown
    This paper will serve as the editorial note on Einstein's 1916 review article on general relativity in a planned volume with all of Einstein's papers in Annalen der Physik. It summarizes much of my other work on history of general relativity and draws heavily on the annotation of Einstein's writings and correspondence on general relativity for Vols. 4, 7, and 8 of the Einstein edition.
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  22.  11
    Sleeping Beauty on Monty Hall.Michel Janssen & Sergio Pernice - unknown
    We present a game show that we claim can serve as a proxy for the notorious Sleeping Beauty Problem. This problem has divided commentators into two camps, 'halfers' and 'thirders'. In our game show, the potential awakenings of Sleeping Beauty, during which she will be asked about the outcome of the coin toss that determined earlier how many times she is awakened and asked, are replaced by potential contestants, deciding whether to choose heads or tails in a bet they will (...)
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  23. Critical Notice: Presentism and Relativity.Yuri Balashov & Michel Janssen - 2003 - British Journal for the Philosophy of Science 54:327--46.
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  24.  91
    The Transition From Newtonian Particle Mechanics to Relativistic Field Mechanics.Michel Janssen - unknown
    Einstein’s 1905 paper on special relativity suggests that relativistic mechanics is simply a matter of adjusting Newton’s to make it Lorentz invariant. Einstein, for instance.
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  25.  88
    Emergence and Interpretation of Lorentz Invariance.Michel Janssen - unknown
    In the course of his work on optics and electrodynamics in systems moving through the ether, the 19th-century medium for light waves and electric and magnetic fields, Lorentz discovered and exploited the invariance of the free-field Maxwell equations under what Poincaré later proposed to call Lorentz transformations. To account for the negative results of optical experiments aimed at detecting the earth’s motion through the ether, Lorentz, in effect, assumed that the laws governing matter interacting with light waves are Lorentz invariant (...)
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  26.  77
    Relativity.Michel Janssen - manuscript
    A brief review (~8K words) of the history and philosophy of special and general relativity for a Dictionary of the History of Ideas.
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  27.  71
    Drawing the Line Between Kinematics and Dynamics.Michel Janssen - unknown
    I defend the widely held view challenged by Harvey Brown in his recent book that special relativity is preferable to those parts of Lorentz’s electron theory it replaced because various phenomena that special relativity reveals to be of purely kinematical origin were given a dynamical explanation in Lorentz’s theory. The phenomena most commonly discussed in this context in the philosophical literature are length contraction and time dilation. I consider three other such phenomena that played a role in the early reception (...)
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  28.  15
    Mind Your P's and Q's: Von Neumann Versus Jordan on the Foundations of Quantum Theory.Anthony Duncan & Michel Janssen - unknown
    In early 1927, Pascual Jordan published his version of what came to be known as the Dirac-Jordan statistical transformation theory. Later that year and partly in response to Jordan, John von Neumann published the modern Hilbert space formalism of quantum mechanics. Central to both formalisms are expressions for conditional probabilities of finding some value for one quantity given the value of another. Beyond that Jordan and von Neumann had very different views about the appropriate formulation of problems in the new (...)
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  29.  72
    Electromagnetic Models of the Electron and the Transition From Classical to Relativistic Mechanics.Michel Janssen & Matthew Mecklenburg - unknown
    This paper is part II of a trilogy on the transition from classical particle mechanics to relativistic continuum mechanics that one of the authors is working on. The first part, on the Trouton experiment, was published in the Stachel festschrift (Janssen 2003). This paper focuses on the Lorentz-Poincaré electron, and, in particular, on the "Poincaré pressure" or "Poincaré stresses" introduced to stabilize the electron. It covers both the original argument by Poincaré (1906) and a modern relativistic argument for adding a (...)
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  30.  32
    From Canonical Transformations to Transformation Theory, 1926–1927: The Road to Jordan's Neue Begründung.Anthony Duncan & Michel Janssen - 2009 - Studies in History and Philosophy of Science Part B 40 (4):352-362.
  31.  43
    Pascual Jordan's Resolution of the Conundrum of the Wave-Particle Duality of Light[REVIEW]Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B.
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  32.  5
    Drawing the Line Between Kinematics and Dynamics in Special Relativity.Michel Janssen - 2009 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 40 (1):26-52.
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  33.  23
    The Einstein-De Sitter Debate and Its Aftermath.Michel Janssen - unknown
    The recently published Vol. 8 of Einstein’s Collected Papers brings together for the first time all extant letters and postcards documenting the famous debate of 1916–18 between Einstein and the Leyden astronomer Willem de Sitter (1872–1934), over, as they referred to it, the relativity of inertia. It was in the course of this debate that the first two relativistic cosmological models were proposed: the “Einstein cylinder world,” filled with a uniform static mass distribution; and the completely empty “De Sitter hyperboloid (...)
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  34. Critical Notice.Michel Janssen - unknown
    In this critical notice we argue against William Craig’s recent attempt to reconcile presentism (roughly, the view that only the present is real) with relativity theory. Craig’s defense of his position boils down to endorsing a ‘neo-Lorentzian interpretation’ of special relativity. We contend that his reconstruction of Lorentz’s theory and its historical development is fatally flawed and that his arguments for reviving this theory fail on many counts.
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  35. A Journey More Important Than Its Destination: Einstein's Quest for General Relativity, 1907–1920.Michel Janssen - unknown
    In 1907, Einstein set out to fully relativize all motion, no matter whether uniform or accelerated. After five failed attempts between 1907 and 1918, he finally threw in the towel around 1920, setting himself a new goal. For the rest of his life he searched for a classical field theory unifying gravity and electromagnetism. As he struggled to relativize motion, Einstein had to readjust both his approach and his objectives at almost every step along the way; he got himself hopelessly (...)
     
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  36.  16
    The Trouton Experiment and E Mc2 =.Michel Janssen - unknown
    In the Fall of 1900, Frederick T. Trouton started work on an ingenious experiment in his laboratory at Trinity College in Dublin. The purpose of the experiment was to detect the earth’s presumed motion through the ether, the 19th century medium thought to carry light waves and electric and magnetic fields. The experiment was unusual in that, unlike most of these so-called ether drift experiments, it was not an experiment in optics. Trouton tried to detect ether drift by charging and (...)
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  37.  2
    Pascual Jordan's Resolution of the Conundrum of the Wave-Particle Duality of Light.Anthony Duncan & Michel Janssen - 2008 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 39 (3):634-666.
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  38. Van Vleck and Slater: Two Americans on the Road to Matrix Mechanics.Michel Janssen - unknown
    I relate the story of how matrix mechanics grew out of the treatment of optical dispersion in the old quantum theory, paying special attention to the contributions of the American theoretical physicists John H. Van Vleck and John C. Slater. Van Vleck shares the credit with Max Born for being the first to publish a full derivation of the crucial Kramers dispersion formula using Bohr’s correspondence principle. Slater was one of the architects of the short-lived but influential Bohr-Kramers-Slater (BKS) theory (...)
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  39.  2
    The Trouble with Orbits: The Stark Effect in the Old and the New Quantum Theory.Anthony Duncan & Michel Janssen - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 48:68-83.
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  40. 19th Century Ether Theory.Michel Janssen - unknown
    Scientists working on the wave theory of light in the 19th century took it for granted that there had to be a medium for the propagation of light waves. This medium was called the luminiferous [= “light carrying”] ether. One of the central questions about this medium concerned its state of motion. There were two options: (1) The ether is completely undisturbed by matter moving through it (stationary or immobile ether); (2) Matter drags along the ether in its vicinity and/or (...)
     
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  41. Forthcoming.“Presentism and Relativity.”.Yuri Balashov & Michel Janssen - forthcoming - British Journal for the Philosophy of Science.
  42.  1
    From Canonical Transformations to Transformation Theory, 1926–1927: The Road to Jordan's Neue Begründung.Anthony Duncan & Michel Janssen - 2009 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 40 (4):352-362.
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  43. From Canonical Transformations to Transformation Theory, 1926–1927: The Road to Jordan's Neue Begründung.Anthony Duncan & Michel Janssen - 2009 - Studies in History and Philosophy of Modern Physics 40 (4):352-362.
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  44. COI Stories'.Michel Janssen - 2001 - Perspectives on Science 10:457-522.
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  45. The Cambridge Companion to Einstein.Michel Janssen & Christoph Lehner (eds.) - 2014 - Cambridge University Press.
    This volume is the first systematic presentation of the work of Albert Einstein, comprising fourteen essays by leading historians and philosophers of science that introduce readers to his work. Following an introduction that places Einstein's work in the context of his life and times, the book opens with essays on the papers of Einstein's 'miracle year', 1905, covering Brownian motion, light quanta, and special relativity, as well as his contributions to early quantum theory and the opposition to his light quantum (...)
     
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  46. .John D. Norton, Juergen Renn, Tilman Sauer, Michel Janssen & John Stachel - 2007
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  47. A Commentary on the Notes on Gravity in the Zürich Notebook.John D. Norton, Juergen Renn, Tilman Sauer, Michel Janssen & John Stachel - 2007 - In .
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