But what are the foundations of physics, which is facing the challenge? To answer this question accurately, it is better to refer to the historical background. Recently, articles have been published that challenge. At first, physicists thought they can solve these problems within the framework of existing theories, but this is not the case today. Since the middle of the last century, physics has faced unanswered questions. When the foundations of science are faced with new problems, only a revolutionary and fundamental theory can solve these problems. There are other things that can be interesting for dear readers. General relativity cannot provide a precise definition of gravitational singularity, in the last three chapters of the book, attempted using CPH theory, the gravitational singularity is defined and explained the reason for the relativistic jets of supermassive black holes. In addition, in the last decade, the results of experiments and papers on the behavior and properties of fundamental particles have been published those challenge old theories (see chapter 32 of the book). On symmetry in physics, and the unification of the fundamental forces has added new stuff that wasn't in the old version. In the new edition of the book, while revisiting the old material, it is attempted to provide a more detailed perspective with specific examples, to distinguish between classical mechanics and quantum mechanics. planning to update the book, whenever, I was confronted with something new that fits this book, I would take notes to incorporate it into the new edition.īecause this book was welcomed, and my extensive communication with students and professors across the world through scientific networks, a year ago, I decided to edit the book "Physics: From the Beginning to Now" and publish it in both Persian and English languages at the same time. During this time, the knowledge of physics has improved and new experiments have been performed that are unique in the history of science because of the accuracy of laboratory instruments. It's been almost ten years since the second edition of the Book "Physics: from the Beginning to Now" (in the Persian language) was published. Contact us to make an appointment.An introduction to the English translation of the book: A user-friendly digital viewing machine is available for use, from which readers can make scans of pages for personal research use. Microfilms are stored and accessed at the Archives Service Center. Oral History Interview Transcriptions - Reels 1-5 (See the 1967 guide above and/or the online catalog above.)īohr, Niels - Scientific Manuscripts - Reels 1-27īohr, Niels - Scientific Correspondence - Reels 1-34 University of Pittsburgh microfilm holdings in this collection:ĪHQP - Main Series - Reels 1-92. Permission to quote from or to publish documents in the AHQP must be obtained from the respective literary heirs, trustees, or deposit library. The AHQP's various finding aids, including Kuhn's inventory, provide only chronological and proper name access to material. The online index at the American Philosophical Society Library gives an index by reel. The International Catalog of Sources for History of Physics and Allied Sciences at AIP can be searched for updated collection information.American Philosophical Society, Philadelphia, 1967. Sources for History of Quantum Physics.Lawrence Badash, Rutherford Correspondence Catalog (New York: American Institute of Physics, 1974).Bruce Wheaton, Catalogue of the Paul Ehrenfest Archive at the Museum Boerhaave, Leiden (Leiden: Museum Boerhaave, 1977).Furthermore, some subcollections have their own published finding aids. It must be remembered, though, that more than half the microfilms in the AHQP were produced after this guide was compiled. S724, Hillman Library - General Collection and Engineering Library, G33 Benedum Hall). Much of the AHQP is described in detail in Kuhn's Sources for History of Quantum Physics (Philadelphia: American Philosophical Society, 1967). This is the most important overview of the collection and its history (Print copy: q QC174.1. Our copy is the farthest west of those in the United States. The University of Pittsburgh is one of nineteen universities worldwide who own this collection and only one of five in the United States.
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