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Topic: Electrodynamics


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In the News (Thu 20 Jun 19)

  
 Quantum electrodynamics - Wikipedia, the free encyclopedia
QED describes all phenomena involving electrically charged particles interacting by means of the electromagnetic force and has been called "the jewel of physics" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the muon, and the Lamb shift of the energy levels of hydrogen.
This area of research culminated in the formulation of quantum electrodynamics by Feynman, Dyson, Schwinger, and Tomonaga during the 1940s.
Quantum electrodynamics is a quantum theory of electrons, positrons, and the electromagnetic field, and served as a role model for subsequent quantum field theories.
en.wikipedia.org /wiki/Quantum_electrodynamics   (913 words)

  
 Quantum Electrodynamics   (Site not responding. Last check: 2007-11-07)
Quantum Electrodynamics has Zero Radius of Convergence An outline of why QED is the most tested theory in the universe.
California Institute for Physics and Astrophysics Research in quantum electrodynamics and quantum field theory with emphasis on a possible connection between the origin of mass and the zero-point fluctuations of the quantum vacuum.
Electrodynamics Textbook An electrodynamics Internet textbook project presenting a new, modern, on-line textbook on advanced electrodynamics, free to download and to contribute to.
www.serebella.com /encyclopedia/article-Quantum_Electrodynamics.html   (343 words)

  
 electrodynamics on Encyclopedia.com   (Site not responding. Last check: 2007-11-07)
This area of electrodynamics, often known as classical electrodynamics, was first systematically explained by the physicist James Clerk Maxwell.
A more recent development is quantum electrodynamics, which was formulated to explain the interaction of electromagnetic radiation with matter, to which the laws of the quantum theory apply.
Cavity quantum electrodynamics effects in a vertical semiconductor cavity with InAs quantum dots.
www.encyclopedia.com /html/e1/electrody.asp   (363 words)

  
 Electrodynamics   (Site not responding. Last check: 2007-11-07)
Electrodynamics is the branch of physics which deals with rapidlychanging electric and magnetic fields.
Many results in electrodynamics are an attempt to explain previously known optical laws, such as Snell's law, byusing appropriately simplified versions of Maxwell'sequations ; and to explain phenomena such as scattering and absorbance of light.
During the late 19th century,physicists noted a contradiction between the accepted laws of electrodynamics and those of classical mechanics.
www.therfcc.org /electrodynamics-35697.html   (254 words)

  
 Electrodynamics   (Site not responding. Last check: 2007-11-07)
Electrodynamics is the most advanced form of electromagnetism.
Many results in electrodynamics are an to explain previously known optical laws such as Snell's law by using appropriately simplified versions of Maxwell's equations ; and to explain phenomena such as and absorbance of light.
In particular Maxwell's equations predicted counterintuitive such as that the speed of light was the same to all observers did not obey Galilean invariance.
www.freeglossary.com /Electrodynamics   (578 words)

  
 International Journal of Electrical Engineering Education: Electrodynamics in formulae   (Site not responding. Last check: 2007-11-07)
I have demonstrated that Maxwell's and Lorentz's postulates are theorems of electrodynamics.
All electrodynamic laws (general laws or matter laws) can be analytically generalized using the principles of conservation of electric charge, electromagnetic energy and electromagnetic impulse.
The primary quantities of electrodynamics are the universal ones (length, time and force), the specific primary quantities (two global state quantities, q and i), four local state quantities E, D, FI, B and two physical constants Eo and po.
www.findarticles.com /p/articles/mi_qa3792/is_199707/ai_n8759483   (1242 words)

  
 Book Review of Modern Problems in Classical Electrodynamics
Electrodynamics is one of the core required courses for any degree in physics.
This prologue seems a bit redundant because the book itself covers time-independent electromagnetic fields and electromagnetic waves in Chapters 3 and 4.According to the preface, Brau’s arrangement of the text was influenced by that of Landau and Lifshitz, starting with a chapter on relativistic kinematics and another on relativistic mechanics and field theory.
The main contribution of this book to the already huge list of books in electrodynamics is the inclusion of sections on nonlinear optics and lasers, topics that are rarely covered in a classical electrodynamics book.
www.aip.org /tip/breview/br7.html   (443 words)

  
 NEWTONIAN ELECTRODYNAMICS   (Site not responding. Last check: 2007-11-07)
It describes a series of important experiments, and new technologies based on these experiments, which cannot be explained by and analyzed with the modern relativistic electrodynamics of the twentieth century.
The Newtonian electrodynamics of Coulomb, Ampere, Neumann, and Kirchhoff, which was current from 1750 to 1900, is fully reviewed and greatly extended to deal with contemporary research on exploding wires, railguns and other electromagnetic accelerators, jet propulsion in liquid metals, arc plasma explosions, capillary fusion, and lightning phenomena.
If you are seriously interested in cold fusion and new energy developments, or if you are an electrical engineer, a scientist, or a teacher of science, this book is a must-read for you.
www.worldscibooks.com /physics/2770.htm   (354 words)

  
 electrodynamics
A more recent development is quantum electrodynamics, which was formulated to explain the interaction of electromagnetic radiation with matter, to which the laws of the
The physicists P. Dirac, W. Heisenberg, and W. Pauli were the pioneers in the formulation of quantum electrodynamics.
must be made; this branch of the theory is called relativistic electrodynamics.
www.factmonster.com /ce6/sci/A0816993.html   (196 words)

  
 Paradoxes of modern electrodynamics p.8.
Dynamic model of an electromagnetic wave accepted in a modern electrodynamics.
About the structure of vacuum, about its involvement in transmission of electromagnetic waves through space is informed nothing.
The Author of this work is one of founders of electrodynamics - Hans Lorentz.
www.pwaves.0catch.com /doc/english/e8.htm   (413 words)

  
 Newtonian Electrodynamics - Book Review
"That not all electrodynamic forces in a metal are mechanical forces on the lattice must have something to do with the two types of bonds that (a) exist between positive and negative charges and (b) between charges and the solid body.
This reviewer is more of a generalist than a specialist, having spent the last seven years reading, reviewing, and publishing reviews of over 3,000 multi-disciplinary papers and books covering the areas of cold fusion and other new-energy systems and the relevant literature.
This reviewer wishes to thank these two authors for their contribution to the continued advancements that must be made in electrodynamics if we are to provide a new-energy technology to replace the currently unacceptable pollution of our planet by the burning of fossil fuels.
www.padrak.com /ine/NEWELBOOK.html   (1214 words)

  
 List of Publications by Iwo Bialynicki-Birula
Two-component formulation of quantum electrodynamics, Proceedings of the Winter School in Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 1964, p.164 (in Russian).
Nonlinear electrodynamics: Variations on a theme by Born and Infeld, in Quantum Theory of Particles and Fields, Eds.
Triumphs and failures of quantum electrodynamics, Acta Physica Polonica B 27, 2403 (1996).
www.cft.edu.pl /~birula/publ.html   (2428 words)

  
 Paradoxes of modern electrodynamics p.1.
This theory is basis of a modern electrodynamics not incidentally.
So, basic equations of Maxwell practically have not undergone changes during more than hundred years, however the large quantity of the applications of these equations to different areas of a science and technique has appeared.
The first theory is based on the laws describing interaction of a field and point particles, which ones are grouped frequently together into stable complexes, such as atoms and molecules; the second describes interaction of fields with a continuous medium.
www.pwaves.0catch.com /doc/english/e1.htm   (244 words)

  
 Sketches of the history of Electromagnetics   (Site not responding. Last check: 2007-11-07)
He also estabishes a connection between light and electrodynamics by showing that the transverse polarization direction of a light beam was rotated about the axis of propagation by a strong magnetic field (today known as "Faraday rotation").
Weber proposes a synthesis of electrostatics, electrodynamics and induction using the idea that electric currents are moing charged particles.
Einstein publishes his paper, "On the Electrodynamics of Moving Bodies," drawing out the symmetries of Lorentz's electromagnetic theory, underlying connection in measurement theory and the status of the electromagnetic aether.
history.hyperjeff.net /electromagnetism.html   (3157 words)

  
 Amazon.ca: Books: Electrodynamics   (Site not responding. Last check: 2007-11-07)
Electrodynamics is a comprehensive study of the field produced by (and interacting with) charged particles, which in practice means almost all matter.
A well-taught electrodynamics course should be less about mathematical minutiae and more about how to think and present arguments.
Avoiding unnecessary technical details and calculations, Electrodynamics will serve both as a useful supplemental text for graduate and advanced undergraduate students and as a helpful overview for physicists who specialize in other fields.
www.amazon.ca /exec/obidos/ASIN/0226519570   (693 words)

  
 Richard P. Feynman - Nobel Lecture
There were several possible solutions of the difficulty of classical electrodynamics, any one of which might serve as a good starting point to the solution of the difficulties of quantum electrodynamics.
Because of the need to do things differentially there had been, in the standard quantum electrodynamics, a complete split of the field into two parts, one of which is called the longitudinal part and the other mediated by the photons, or transverse waves.
Thus, classical electrodynamics can be described by a field view, or an action at a distance view, etc. Originally, Maxwell filled space with idler wheels, and Faraday with fields lines, but somehow the Maxwell equations themselves are pristine and independent of the elaboration of words attempting a physical description.
www.nobel.se /physics/laureates/1965/feynman-lecture.html   (9768 words)

  
 Business Wire: L-3 Communications Acquires Electrodynamics Inc. @ HighBeam Research   (Site not responding. Last check: 2007-11-07)
Electrodynamics is a leading manufacturer of data recorders, display-related components, electronic safe arm and fire devices and other electronic products for defense, government agency and commercial customers.
Based in Rolling Meadows, Illinois, Electrodynamics designs and develops military aircraft data recorders for prime contractors such as Lockheed Martin and Boeing, in addition to locomotive data recorders for customers including GE Transportation Systems and General Motors.
Electrodynamics also manufactures integrated display-related components for aircraft and major aircraft subsystems and safe arm and fire devices on such missile platforms as Hellfire, Javelin and Longbow.
www.highbeam.com /library/doc0.asp?DOCID=1G1:53434238&refid=holomed_1   (396 words)

  
 quantum electrodynamics --¬† Encyclop√¶dia Britannica   (Site not responding. Last check: 2007-11-07)
QED is a relativistic theory in that Albert Einstein's theory of special relativity is built into each of its equations.
QCD was constructed on analogy to quantum electrodynamics (QED), the quantum theory of the electromagnetic force.
The resulting quantum field theory is known as quantum electrodynamics, or...
www.britannica.com /eb/article-9062163?tocId=9062163   (819 words)

  
 Classical Electrodynamics - graduate course   (Site not responding. Last check: 2007-11-07)
The course is about classical electrodynamics at an advanced level.
Electrodynamics of Continuous Media (Course of Theoretical Physics, Volume 8).
Barut, Electrodynamics and Classical Theory of Fields and Particles (Dover, New York, 1980).
fy.chalmers.se /~apell/ced01.html   (259 words)

  
 The Suppressed Electrodynamics Of Ampère-Gauss-Weber
Foremost among these were the angular (or relative velocity) dependency of the electrodynamic force, and the little problem of where gravitation should fit in.
Another approach to the unification of gravitation with the Ampère-Gauss-Weber electrodynamics, was taken at the beginning of the 20th Century by the Swiss mathematical physicist, Walther Ritz.
As for electrodynamics, so for the history of atomic theory, the modern teaching is largely a fairy tale.
www.21stcenturysciencetech.com /articles/spring01/Electrodynamics.html   (4265 words)

  
 Quantum Electrodynamics (QED)   (Site not responding. Last check: 2007-11-07)
Quantum electrodynamics, commonly referred to as QED, is a quantum field theory of the electromagnetic force.
Taking the example of the force between two electrons, the classical theory of electromagnetism would describe it as arising from the electric field produced by each electron at the position of the other.
The development of the theory was the basis of the 1965 Nobel Prize in physics, awarded to Richard Feynman, Julian Schwinger and Sin-itero Tomonaga.
hyperphysics.phy-astr.gsu.edu /hbase/forces/qed.html   (199 words)

  
 The effects of the Aharonov-Bohm type as tests of the relativistic interpretation of electrodynamics   (Site not responding. Last check: 2007-11-07)
Going back to the classical interpretation of the effects of the AB type, as a counter example, a phase of classical origin is that of the MP effect, where charged particles interact with a dipolar charge distribution and there are em forces, of zero average along the path, acting on the particle.
The correct expression of the force must be determined by the internal consistency of electrodynamics and by experimental verification.
In a nonrelativistic interpretation of electrodynamics, a current may be defined as due to charges moving in a closed circuit.
itis.volta.alessandria.it /episteme/ep3-14.htm   (4066 words)

  
 On the Electrodynamics of Moving Bodies
The observable phenomenon here depends only on the relative motion of the conductor and the magnet, whereas the customary view draws a sharp distinction between the two cases in which either the one or the other of these bodies is in motion.
In the conductor, however, we find an electromotive force, to which in itself there is no corresponding energy, but which gives rise--assuming equality of relative motion in the two cases discussed--to electric currents of the same path and intensity as those produced by the electric forces in the former case.
They suggest rather that, as has already been shown to the first order of small quantities, the same laws of electrodynamics and optics will be valid for all frames of reference for which the equations of mechanics hold good.
www.fourmilab.ch /etexts/einstein/specrel/www   (6419 words)

  
 Syllabus for Physics 319: Advanced Electrodynamics (E&M II)
Physics 319 is the second semester of the department's one year sequence on Classical Electrodynamics for graduate students.
The main topics of this course are the special relativity, relativistic mechanics, radiation by moving charges, collision and scattering of charged particles, and other special topics on electro-magnetic fields and charged particles.
Liénard-Wiechert potentials and radiation theory are studied as core examples of applying the relativistic electrodynamics to real physics problems.
www.phy.duke.edu /~wu/319/syllabus.html   (506 words)

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