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Arthur S. Eddington the Nature of the Physical World
Arthur S. Eddington The Nature of the Physical World Arthur S. Eddington The Nature of the Physical World Gifford Lectures of 1927: An Annotated Edition Annotated and Introduced By H. G. Callaway Arthur S. Eddington, The Nature of the Physical World: Gifford Lectures of 1927: An Annotated Edition, by H. G. Callaway This book first published 2014 Cambridge Scholars Publishing 12 Back Chapman Street, Newcastle upon Tyne, NE6 2XX, UK British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Copyright © 2014 by H. G. Callaway All rights for this book reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright owner. ISBN (10): 1-4438-6386-6, ISBN (13): 978-1-4438-6386-5 CONTENTS Note to the Text ............................................................................... vii Eddington’s Preface ......................................................................... ix A. S. Eddington, Physics and Philosophy .......................................xiii Eddington’s Introduction ................................................................... 1 Chapter I .......................................................................................... 11 The Downfall of Classical Physics Chapter II ......................................................................................... 31 Relativity Chapter III -
Einstein's Mistakes
Einstein’s Mistakes Einstein was the greatest genius of the Twentieth Century, but his discoveries were blighted with mistakes. The Human Failing of Genius. 1 PART 1 An evaluation of the man Here, Einstein grows up, his thinking evolves, and many quotations from him are listed. Albert Einstein (1879-1955) Einstein at 14 Einstein at 26 Einstein at 42 3 Albert Einstein (1879-1955) Einstein at age 61 (1940) 4 Albert Einstein (1879-1955) Born in Ulm, Swabian region of Southern Germany. From a Jewish merchant family. Had a sister Maja. Family rejected Jewish customs. Did not inherit any mathematical talent. Inherited stubbornness, Inherited a roguish sense of humor, An inclination to mysticism, And a habit of grüblen or protracted, agonizing “brooding” over whatever was on its mind. Leading to the thought experiment. 5 Portrait in 1947 – age 68, and his habit of agonizing brooding over whatever was on its mind. He was in Princeton, NJ, USA. 6 Einstein the mystic •“Everyone who is seriously involved in pursuit of science becomes convinced that a spirit is manifest in the laws of the universe, one that is vastly superior to that of man..” •“When I assess a theory, I ask myself, if I was God, would I have arranged the universe that way?” •His roguish sense of humor was always there. •When asked what will be his reactions to observational evidence against the bending of light predicted by his general theory of relativity, he said: •”Then I would feel sorry for the Good Lord. The theory is correct anyway.” 7 Einstein: Mathematics •More quotations from Einstein: •“How it is possible that mathematics, a product of human thought that is independent of experience, fits so excellently the objects of physical reality?” •Questions asked by many people and Einstein: •“Is God a mathematician?” •His conclusion: •“ The Lord is cunning, but not malicious.” 8 Einstein the Stubborn Mystic “What interests me is whether God had any choice in the creation of the world” Some broadcasters expunged the comment from the soundtrack because they thought it was blasphemous. -
Imagining Outer Space Also by Alexander C
Imagining Outer Space Also by Alexander C. T. Geppert FLEETING CITIES Imperial Expositions in Fin-de-Siècle Europe Co-Edited EUROPEAN EGO-HISTORIES Historiography and the Self, 1970–2000 ORTE DES OKKULTEN ESPOSIZIONI IN EUROPA TRA OTTO E NOVECENTO Spazi, organizzazione, rappresentazioni ORTSGESPRÄCHE Raum und Kommunikation im 19. und 20. Jahrhundert NEW DANGEROUS LIAISONS Discourses on Europe and Love in the Twentieth Century WUNDER Poetik und Politik des Staunens im 20. Jahrhundert Imagining Outer Space European Astroculture in the Twentieth Century Edited by Alexander C. T. Geppert Emmy Noether Research Group Director Freie Universität Berlin Editorial matter, selection and introduction © Alexander C. T. Geppert 2012 Chapter 6 (by Michael J. Neufeld) © the Smithsonian Institution 2012 All remaining chapters © their respective authors 2012 All rights reserved. No reproduction, copy or transmission of this publication may be made without written permission. No portion of this publication may be reproduced, copied or transmitted save with written permission or in accordance with the provisions of the Copyright, Designs and Patents Act 1988, or under the terms of any licence permitting limited copying issued by the Copyright Licensing Agency, Saffron House, 6–10 Kirby Street, London EC1N 8TS. Any person who does any unauthorized act in relation to this publication may be liable to criminal prosecution and civil claims for damages. The authors have asserted their rights to be identified as the authors of this work in accordance with the Copyright, Designs and Patents Act 1988. First published 2012 by PALGRAVE MACMILLAN Palgrave Macmillan in the UK is an imprint of Macmillan Publishers Limited, registered in England, company number 785998, of Houndmills, Basingstoke, Hampshire RG21 6XS. -
A Singing, Dancing Universe Jon Butterworth Enjoys a Celebration of Mathematics-Led Theoretical Physics
SPRING BOOKS COMMENT under physicist and Nobel laureate William to the intensely scrutinized narrative on the discovery “may turn out to be the greatest Henry Bragg, studying small mol ecules such double helix itself, he clarifies key issues. He development in the field of molecular genet- as tartaric acid. Moving to the University points out that the infamous conflict between ics in recent years”. And, on occasion, the of Leeds, UK, in 1928, Astbury probed the Wilkins and chemist Rosalind Franklin arose scope is too broad. The tragic figure of Nikolai structure of biological fibres such as hair. His from actions of John Randall, head of the Vavilov, the great Soviet plant geneticist of the colleague Florence Bell took the first X-ray biophysics unit at King’s College London. He early twentieth century who perished in the diffraction photographs of DNA, leading to implied to Franklin that she would take over Gulag, features prominently, but I am not sure the “pile of pennies” model (W. T. Astbury Wilkins’ work on DNA, yet gave Wilkins the how relevant his research is here. Yet pulling and F. O. Bell Nature 141, 747–748; 1938). impression she would be his assistant. Wilkins such figures into the limelight is partly what Her photos, plagued by technical limitations, conceded the DNA work to Franklin, and distinguishes Williams’s book from others. were fuzzy. But in 1951, Astbury’s lab pro- PhD student Raymond Gosling became her What of those others? Franklin Portugal duced a gem, by the rarely mentioned Elwyn assistant. It was Gosling who, under Franklin’s and Jack Cohen covered much the same Beighton. -
Moon Minerals a Visual Guide
Moon Minerals a visual guide A.G. Tindle and M. Anand Preliminaries Section 1 Preface Virtual microscope work at the Open University began in 1993 meteorites, Martian meteorites and most recently over 500 virtual and has culminated in the on-line collection of over 1000 microscopes of Apollo samples. samples available via the virtual microscope website (here). Early days were spent using LEGO robots to automate a rotating microscope stage thanks to the efforts of our colleague Peter Whalley (now deceased). This automation speeded up image capture and allowed us to take the thousands of photographs needed to make sizeable (Earth-based) virtual microscope collections. Virtual microscope methods are ideal for bringing rare and often unique samples to a wide audience so we were not surprised when 10 years ago we were approached by the UK Science and Technology Facilities Council who asked us to prepare a virtual collection of the 12 Moon rocks they loaned out to schools and universities. This would turn out to be one of many collections built using extra-terrestrial material. The major part of our extra-terrestrial work is web-based and we The authors - Mahesh Anand (left) and Andy Tindle (middle) with colleague have build collections of Europlanet meteorites, UK and Irish Peter Whalley (right). Thank you Peter for your pioneering contribution to the Virtual Microscope project. We could not have produced this book without your earlier efforts. 2 Moon Minerals is our latest output. We see it as a companion volume to Moon Rocks. Members of staff -
Forstreviere in Nöten? Glosse Halbschlauer Die Sparpolitik Des Bundes Wird Konkret – Die Forstwirtschaft Leidet Fuchs O B E R W a L L I S
AZ 3900 Brig Dienstag, 13. Januar 2004 Unabhängige Tageszeitung 164. Jahrgang Nr. 9 Fr. 2.— Auflage: 27459 Ex. Redaktion: Tel. 027 / 922 99 88 Abonnentendienst: Tel. 027 / 948 30 50 Mengis Annoncen: Tel. 027 / 948 30 40 Forstreviere in Nöten? Glosse Halbschlauer Die Sparpolitik des Bundes wird konkret – die Forstwirtschaft leidet Fuchs O b e r w a l l i s. – (wb) Es ist Da geht ein junger Walliser nicht ausgeschlossen, dass es in im Baselbiet auf die Jagd. einzelnen Oberwalliser Forstre- Er ist Gastjäger in einem vieren im kommenden Frühjahr Revier. Zur Strecke kom- zur Nichtwiederanstellung von men auch zwei Füchse. Wie Beschäftigten kommt. Auch nun das Zentralorgan der dürfte sich die Zahl der Forstre- Schweizer Patentjäger, der viere in den nächsten Jahren un- «Schweizer Jäger», in sei- ter dem wachsenden Spardruck ner Rubrik «Fehlschuss» zu von heute 19 auf 12 reduzieren. berichten weiss, hat sich Doris Leuthard will nicht Die weiter bestehenden Forstre- der Sportsfreund die Pfoten CVP-Präsidentin werden. viere müssen enger zusammen- dieser Basler Füchse gesi- Foto Keystone arbeiten und weitere Kosten- chert, um damit im Wallis – senkungsmassnahmen ergrei- widerrechtlich – Abschuss- fen. prämien zu kassieren. Leuthard und Diese Massnahmen drängen Halt als typische Walliser sich schon nach dem ersten Ent- Mentalität sei dieser Frick sagen ab lastungsprogramm für die Bun- «Bschiss» von den Mitjä- S c h w e i z. – (wb) Gestern desfinanzen auf. Weitere Spar- gern entrüstet gebrand- gaben die beiden heissest ge- programme des Bundes bei markt worden. Der höchs- handelten Kandidaten auf das gleichzeitigen Steuerermässi- tens halbschlaue Prämien- CVP-Präsidium, die Natio- gungen, wie sie die eidgenössi- erschleicher hat für unse- nalrätin Doris Leuthard und schen Räte beschlossen haben, ren Kanton wirklich ein Bruno Frick, ihren Verzicht dürften den Spardruck weiter schönes Zeugnis abgelegt. -
Ontology in Quantum Mechanics
Ontology in quantum mechanics Gerard 't Hooft Faculty of Science, Institute for Theoretical Physics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands e-mail: [email protected] internet: http://www.staff.science.uu.nl/˜hooft101/ Abstract It is suspected that the quantum evolution equations describing the micro-world as we know it are of a special kind that allows transformations to a special set of basis states in Hilbert space, such that, in this basis, the evolution is given by ele- ments of the permutation group. This would restore an ontological interpretation. It is shown how, at low energies per particle degree of freedom, almost any quantum system allows for such a transformation. This contradicts Bell's theorem, and we emphasise why some of the assumptions made by Bell to prove his theorem cannot hold for the models studied here. We speculate how an approach of this kind may become helpful in isolating the most likely version of the Standard Model, combined with General Relativity. A link is suggested with black hole physics. Keywords: foundations quantum mechanics, fast variables, cellular automaton, classical/quantum evolution laws, Stern-Gerlach experiment, Bell's theorem, free will, Standard Model, anti-vacuum state. arXiv:2107.14191v1 [quant-ph] 29 Jul 2021 1 1 Introduction Since its inception, during the first three decades of the 20th century, quantum mechanics was subject of intense discussions concerning its interpretation. Since experiments were plentiful, and accurate calculations could be performed to com- pare the experimental results with the theoretical calculations, scientists quickly agreed on how detailed quantum mechanical models could be arrived at, and how the calculations had to be done. -
TRINITY HALL NEWSLETTER SPRING 2005 Newsletter SPRING 2005
TRINITY HALL CAMBRIDGE TRINITY HALL NEWSLETTER SPRING 2005 Newsletter SPRING 2005 The Trinity Hall Newsletter is published by the College. Printed by Cambridge Printing, the printing business of Cambridge University Press. www.cambridgeprinting.org Thanks are extended to all the contributors and to the Editor, Liz Pentlow Trinity Hall Newsletter SPRING 2005 College Reports ............................................................................ 3 Trinity Hall Association & Alumni Reports............................. 33 Lectures & Research .................................................................. 51 Student Activities, Societies & Sports ...................................... 79 The Gazette .............................................................................. 109 Keeping in Touch & Booking Forms ..................... Cream Section Section One College Reports 3 The Master Professor Martin Daunton MA PhD LittD FRHistS FBA Professor of Economic History, Chair of the School of Humanities and Social Sciences Fellows and Fellow-Commoners Professor John Denton MA PhD FREng FRS Vice Master, Professor of Turbo Machinery Aerodynamics Professor Colin Austin MA DPhil FBA Praelector, Graduate Mentor, Professorial Fellow and Director of Studies in Classics; Professor of Greek David Fleming MA LLB Tutor and Staff Fellow in Law Professor Thomas Körner MA PhD ScD Graduate Mentor, Staff Fellow and Director of Studies in Mathematics; Professor of Fourier Analysis Dr David Rubenstein MA MD FRCP Graduate Mentor, Staff Fellow and Director -
July 1998 SOOETY
ISSN 0739-4934 NEWSLETTER I {!STORY OFSOENCE VOLUME 27 NUMBER 3 July 1998 SOOETY HSSin If you do not intend to' rent a car, your best option to reach the hotel from the Kansas Ciry International Airport is KCI Shuttle. It provides transportation to the Hyatt from the airport for just $19 round-trip. After deplaning and retrieving your luggage, simply look for a KCI Shuttle booth (they are located adjacent to most gates), purchase a ticket, and you will soon be at the Hyatt. Shuttles leave the airport every 30 minutes ... with a similar schedule form the hotel to return to the airport. Taxi service is also The History of Science Sociery will forms are available on page 5 ofthis newsletter available, but the fare is about $35 one way. be gathering in the "Land of Oz," the city of and must be returned to the Hyatt Regency The weather in late October should fountains, and the site of the Negro Baseball by 21 September to guarantee space. A be ideal. Average daytime highs are 68 degrees, League Hall ofFame, Kansas City from 22-25 floorplan of the hotel and its meetings rooms with the nighttime temperature falling to the October 1998. For those of you who have is available on the HSS website. low 40s. We will have a variery of receptions never been to Kansas City, you are in for a rare Association Travel Concepts is the to makeyourvisitswith your favorite colleagues treat. The ciry is also home of the Linda Hall official agent for the 1998 HSS meeting. -
Confusions Regarding Quantum Mechanics Gerard ’T Hooft, Reply by Sheldon Lee Glashow
INFERENCE / Vol. 5, No. 3 Confusions Regarding Quantum Mechanics Gerard ’t Hooft, reply by Sheldon Lee Glashow In response to “The Yang–Mills Model” (Vol. 5, No. 2). began to argue about how the equation is supposed to be interpreted. Why is it that positions and velocities of par- ticles at one given moment cannot be calculated, or even To the editors: defined unambiguously? Physicists know very well how to use the equation. Quantum mechanics was one of the most significant and They use it to derive with perplexing accuracy the prop- important discoveries of twentieth-century science. It all erties of atoms, molecules, elementary particles, and the began, I think, in the year 1900 when Max Planck published forces between all of these. The way the equation is used his paper entitled “On the Theory of the Energy Distribu- is nothing to complain about, but what exactly does it say? tion Law of the Normal Spectrum.”1 In it, he describes a The first question one may rightfully ask, and that simple observation: if one attaches an entropy to the radi- has been asked by many researchers and their students, ation field as if its total energy came in packages—now is this: called quanta—then the intensity of the radiation associ- ated to a certain temperature agrees quite well with the What do these wave functions represent? In particular, what observations. Planck had described his hypothesis as “an is represented by the wave functions that are not associ- act of desperation.”2 But it was the only one that worked. -
Reflections on a Revolution John Iliopoulos, Reply by Sheldon Lee Glashow
INFERENCE / Vol. 5, No. 3 Reflections on a Revolution John Iliopoulos, reply by Sheldon Lee Glashow In response to “The Yang–Mills Model” (Vol. 5, No. 2). Internal Symmetries As Glashow points out, particle physicists distinguish To the editors: between space-time and internal symmetry transforma- tions. The first change the point of space and time, leaving Gauge theories brought about a profound revolution in the the fundamental equations unchanged. The second do not way physicists think about the fundamental forces. It is this affect the space-time point but transform the dynamic vari- revolution that is the subject of Sheldon Glashow’s essay. ables among themselves. This fundamentally new concept Gauge theories, such as the Yang–Mills model, use two was introduced by Werner Heisenberg in 1932, the year mathematical concepts: group theory, which is the natural the neutron was discovered, but the real history is more language to describe the physical property of symmetry, complicated.3 Heisenberg’s 1932 papers are an incredible and differential geometry, which connects in a subtle way mixture of the old and the new. For many people at that symmetry and dynamics. time, the neutron was a new bound state of a proton and Although there exist several books, and many more an electron, like a small hydrogen atom. Heisenberg does articles, relating historical aspects of these theories,1 a not reject this idea. Although for his work he considers real history has not yet been written. It may be too early. the neutron as a spin one-half Dirac fermion, something When a future historian undertakes this task, Glashow’s incompatible with a proton–electron bound state, he notes precise, documented, and authoritative essay will prove that “under suitable circumstances [the neutron] can invaluable. -
Otto Stern Annalen 22.9.11
September 22, 2011 Otto Stern (1888-1969): The founding father of experimental atomic physics J. Peter Toennies,1 Horst Schmidt-Böcking,2 Bretislav Friedrich,3 Julian C.A. Lower2 1Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37073 Göttingen 2Institut für Kernphysik, Goethe Universität Frankfurt Max-von-Laue-Strasse 1, 60438 Frankfurt 3Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195 Berlin Keywords History of Science, Atomic Physics, Quantum Physics, Stern- Gerlach experiment, molecular beams, space quantization, magnetic dipole moments of nucleons, diffraction of matter waves, Nobel Prizes, University of Zurich, University of Frankfurt, University of Rostock, University of Hamburg, Carnegie Institute. We review the work and life of Otto Stern who developed the molecular beam technique and with its aid laid the foundations of experimental atomic physics. Among the key results of his research are: the experimental determination of the Maxwell-Boltzmann distribution of molecular velocities (1920), experimental demonstration of space quantization of angular momentum (1922), diffraction of matter waves comprised of atoms and molecules by crystals (1931) and the determination of the magnetic dipole moments of the proton and deuteron (1933). 1 Introduction Short lists of the pioneers of quantum mechanics featured in textbooks and historical accounts alike typically include the names of Max Planck, Albert Einstein, Arnold Sommerfeld, Niels Bohr, Werner Heisenberg, Erwin Schrödinger, Paul Dirac, Max Born, and Wolfgang Pauli on the theory side, and of Konrad Röntgen, Ernest Rutherford, Max von Laue, Arthur Compton, and James Franck on the experimental side. However, the records in the Archive of the Nobel Foundation as well as scientific correspondence, oral-history accounts and scientometric evidence suggest that at least one more name should be added to the list: that of the “experimenting theorist” Otto Stern.