Fundamental Constants
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Fundamental Constants
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Author : Boris M. Menin
language : en
Publisher: Cambridge Scholars Publishing
Release Date : 2019-02-27
Fundamental Constants written by Boris M. Menin and has been published by Cambridge Scholars Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-27 with Mathematics categories.
The book is devoted to one of the important areas of theoretical and experimental physics—the calculation of the accuracy of measurements of fundamental physical constants. To achieve this goal, numerous methods and criteria have been proposed. However, all of them are focused on identifying a posteriori uncertainty caused by the idealization of the model and its subsequent computerization in comparison with the physical system. This book focuses on formulating an a priori interaction between the level of a detailed description of a material object (the number of registered quantities) and the lowest uncertainty in measuring a physical constant. It contains the materials necessary for the optimal design of models describing a physical phenomenon. It will appeal to scientists and engineers, as well as university students.
Precision Measurement And Fundamental Constants Proceedings
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Author : Barry N. Taylor
language : en
Publisher:
Release Date : 1971
Precision Measurement And Fundamental Constants Proceedings written by Barry N. Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Physical measurements categories.
Astrophysics Clocks And Fundamental Constants
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Author : Savely G. Karshenboim
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-08-11
Astrophysics Clocks And Fundamental Constants written by Savely G. Karshenboim and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-08-11 with Science categories.
The question of a possible temporal variation of the fundamental constants was raised by Paul Dirac in his "large number hypothesis" in 1937. Today it appears in the context of the search for a unified theory of the fundamental interactions. It touches both fundamental and applied physics, as the postulate of the unalterability of the constants is the foundation for modern metrology. The book presents reviews written by leading experts in the field. Focussing on the question of variations of the fundamental "constants" in time or space, the chapters cover the theoretical framework in which variations are expected and the search for variations of quantities like the fine-structure constant, the electron/proton mass ratio, g-factors of proton and neutron etc. in astrophysical and geophysical observations and in precision experiments with atomic clocks and frequency standards.
Metrology And Fundamental Constants
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Author : Theo W. Hänsch
language : en
Publisher: IOS Press
Release Date : 2007
Metrology And Fundamental Constants written by Theo W. Hänsch and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Computers categories.
One of the exciting characteristics of metrology is its intimate relationship between fundamental physics and the leading edge of technology which is needed to perform advanced and challenging experiments and measurements. This title includes a set of lectures which present the relevant progress in Metrology.
The 1973 Least Squares Adjustment Of The Fundamental Constants
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Author : E. Richard Cohen
language : en
Publisher:
Release Date : 1973
The 1973 Least Squares Adjustment Of The Fundamental Constants written by E. Richard Cohen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Least squares categories.
The Constants Of Nature
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Author : John D. Barrow
language : en
Publisher: Random House
Release Date : 2010-07-06
The Constants Of Nature written by John D. Barrow and has been published by Random House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-06 with Science categories.
The constants of nature are the numbers that define the essence of the Universe. They tell us how strong its forces are, and what its fundamental laws can do: the strength of gravity, of magnetism, the speed of light, and the masses of the smallest particles of matter. They encode the deepest secrets of the Universe and express at once our greatest knowledge and our greatest ignorance about the cosmos. Their existence has taught us the profound truth that Nature abounds with unseen regularities. Yet, while we have become skilled at measuring the values of these constants, our frustrating inability to explain or predict their values shows how much we still have to learn about the inner workings of the Universe. What is the ultimate status of these constants of Nature? Are they truly constant? Could life have evolved and persisted if they were even slightly different? And are there other Universes where they are different? These are some of the issues that this book grapples with. It looks back to the discoveries of the first constants of Nature and the impact they had on scientists like Einstein. This book also tells the story of a tantalising new development in astronomy. For the first time astronomical observations are suggesting that some of the constants of Nature were different when the Universe was younger. So are our laws of Nature slowly changing? Is anything about our Universe immune from the ravages of time? Are there any constants of Nature at all?
Atomic Masses And Fundamental Constants 5
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Author : J. Sanders
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Atomic Masses And Fundamental Constants 5 written by J. Sanders and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.
1 The Fundamental Constants and Metrology.- The Measurement of Fundamental Constants (Metrology) and Its Effect on Scientific and Technical Progress.- Constantes Physiques et Métrologie.- 2 Gamma rays.- Gamma-Ray Energies for Calibration of Ge(Li) spectrometers.- Primary Standards for Gamma Energy Determinations.- Precision Measurements of Relative ?-Ray Energies with a Curved Crystal Diffractometer.- Visible to Gamma-Ray Wavelength Ratio.- Determination of Proton Binding Energies for 89Y, 90Zr, 91Nb and 93Tc from (p, ?) Reaction Q-values.- A New Method for Measurement of Proton Beam Energies.
Recent Advances In Metrology And Fundamental Constants
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Author : T.J. Quinn
language : en
Publisher: IOS Press
Release Date : 2001-12-18
Recent Advances In Metrology And Fundamental Constants written by T.J. Quinn and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-12-18 with Science categories.
The exchange between physics and metrology is always fascinating and exciting. Many are the open problems in physics that call for extremely precise standards, many are the advances in metrology made possible by a deep and assiduous study of the underlying physics. One has just to think of the enormous sophistication required in the measurements of some absolute quantities such as the Avogadro, the gas, or the gravitational constants. It is also worth noticing that not only the units of a metrological system are interrelated through the fundamental constants, but also the latter find their full significance when they are determined through the most exacting metrological experiments. Over the past decade many improvements took place and these are discussed in this book; from one side the old caesium SI second definition has found a new realisation, with the “fountain” approach, replacing the classical thermal atomic beam. The use of “cold” atom techniques, in which bunches of inert atoms are collected, slowed down, and cooled, has opened a number of new and unexpected avenues for metrology and fundamental constants; one of these possibilities being the atom interferometry. Another important “quantum jump” was the demonstration of the possibility of performing a direct frequency division in the visible, using ultra short femtosecond pulses. In addition, the possibility of “counting” electrons or photons gave a fundamental support to the development of single-electron capacitance standards and to new scenarios in the absolute calibration of photo-detectors.
Quantum Metrology And Fundamental Physical Constants
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Author : A.A. Lucas
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-12-01
Quantum Metrology And Fundamental Physical Constants written by A.A. Lucas and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-01 with Science categories.
The object of this NATO Advanced Study Institute was to pre sent a tutorial 'introduction both to the basic physics of recent spectacular advances achieved in the field of metrology and to the determination of fundamental physical constants. When humans began to qualify their description of natural phenomena, metrology, the science of measurement, developed along side geometry and mathematics. However, flam antiquity to modern times, the role of metrology was mostly restricted to the need of commercial, social or scientific transactions of local or at most national scope. Beginning with the Renaissance, and particularly in western Europe during the last century, metrology rapidly developed an international character as a result of growing needs for more accurate measurements and common standards in the emerging indus trial society. Although the concerns of metrology are deeply rooted to fundamental sciences, it was, until recently, perceived by much of the scientific community as mostly custodial in character.
Metrology And Physical Constants
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Author : A. Di Giuseppe
language : en
Publisher: IOS Press
Release Date : 2013-10-21
Metrology And Physical Constants written by A. Di Giuseppe and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-21 with Science categories.
The reliability and accuracy of systems of measurement continue to advance. We are about to enter a period of the most stable measurement system we can imagine with the anticipated new definitions of the SI units of measurement; a direct link between fundamental physics and metrology which will eliminate the current definition of the kilogram, until now based upon an artifact. This book presents selected papers from Course 185 of the Enrico Fermi International School of Physics, held in Varenna, Italy, in July 2012 and jointly organized with the Bureau International des Poids et Mesures (BIPM). The papers delivered at the school covered some of the most advanced topics in the discipline of metrology, including nano-technologies; quantum information and quantum devices; biology and medicine; food; surface quality; ionising radiation for health, environment, art and archaeology; and climate. The continuous and striking advances in basic research concerning atomic frequency standards operating both in the visible range and at microwave levels and the applications to satellite systems are also considered, in the framework of a historical review of the international organization of metrology, as are the problems inherent in uncertainty statements and definitions. This book will be of interest to all those whose work involves scientific measurement at the highest levels of accuracy.