Interstellar Propagation of Electromagnetic Signals

Interstellar Propagation of Electromagnetic Signals PDF

Author: Henning F. Harmuth

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 288

ISBN-13: 1461542472

DOWNLOAD EBOOK →

Most texts on electromagnetic theory follow the classical approach of steady state solutions of Maxwell's equations. In Interstellar Propagation of Electromagnetic Signals, the authors, H. Harmuth and K. Lukin, point out the deficiencies in Maxwell's theory and present an exciting new way of obtaining transient or signals solutions. This book can be used by researchers, graduate students and scientists in the areas of physics, astrophysics, astronomy and electromagnetic theory or electromagnetics.

Propagation of Electromagnetic Signals

Propagation of Electromagnetic Signals PDF

Author: Henning F. Harmuth

Publisher: World Scientific

Published: 1994

Total Pages: 318

ISBN-13: 9789810216894

DOWNLOAD EBOOK →

Maxwell's equations have been the basis of electromagnetic theory for a century. They were very successful in providing solutions with sinusoidal time variation, but these solutions are outside the causality law and the conservation law for energy. Signal solutions, which satisfy these two laws, generally do not exist, but can be obtained by adding a term for magnetic dipole currents to Maxwell's equations. Such currents are caused by the rotation of magnetic dipoles, ranging from the hydrogen atom to the magnetic compass needle. Many computer plots of the time variation of electric and magnetic field strengths excited by signals are given in this useful book.

Electromagnetic Theory and Wave Propagation

Electromagnetic Theory and Wave Propagation PDF

Author: S. N. Ghosh

Publisher:

Published: 1998

Total Pages: 258

ISBN-13: 9788173191626

DOWNLOAD EBOOK →

Electromagnetic theory remains an active field of research. After World War II space probes, in particular, satellites have been used extensively and as a result our knowledge of ionosphere and atmosphere through which electromagnetic waves propagate, has been extended considerably. Ingenious ground-based techniques such as incoherent back scattering is developed. Also precise laboratory experiments are conducted for determining upper atmospheric parameters. Previously, electromagnetic waves having frequencies less than 30 MHz were used for ionospheric probing. At present waves of higher frequencies, VHF, microwave and millimeter waves, have been utilized for investigation. The vista of investigation are extended to cover ionosphere to interplanetary, interstellar space and objects embedded in these regions. Artificial satellite communication has revolutionized the communication process. The present book is an up-to-date account of the results of this important field of research with special reference to achievements carried out after World War II.

Modified Maxwell Equations In Quantum Electrodynamics

Modified Maxwell Equations In Quantum Electrodynamics PDF

Author: Terence William Barrett

Publisher: World Scientific

Published: 2001-11-19

Total Pages: 313

ISBN-13: 9814489980

DOWNLOAD EBOOK →

Divergencies in quantum field theory referred to as “infinite zero-point energy” have been a problem for 70 years. Renormalization has always been considered an unsatisfactory remedy.In 1985 it was found that Maxwell's equations generally do not have solutions that satisfy the causality law. An additional term for magnetic dipole currents corrected this shortcoming. Rotating magnetic dipoles produce magnetic dipole currents, just as rotating electric dipoles in a material like barium titanate produce electric dipole currents. Electric dipole currents were always part of Maxwell's equations.This book shows that the correction of Maxwell's equations eliminates the infinite zero-point energy in quantum electrodynamics. In addition, it presents many more new results.

Advances in Imaging and Electron Physics

Advances in Imaging and Electron Physics PDF

Author: Henning Harmuth

Publisher: Academic Press

Published: 2009-06-12

Total Pages: 337

ISBN-13: 0080880363

DOWNLOAD EBOOK →

In this volume, the authors extend the calculus of finite differences to Dirac's equation. They obtain solutions for particles with negative mass that are completely equivalent to the solutions with positive mass. In addition, they obtain solutions for nuclear distances of the order of 10-13m and less rather than for the usual atomic distances. They report a number of other deviations from the differential theory, for instance they found a slight deviation in the eigenvalues of an electron in a Coulomb field, similar to the Lamb shift. In two sections some surprising results are shown for the concept of space caused by the replacement of dx by delta x.

Advances in Imaging and Electron Physics

Advances in Imaging and Electron Physics PDF

Author:

Publisher: Academic Press

Published: 2010-11-02

Total Pages: 399

ISBN-13: 0123813131

DOWNLOAD EBOOK →

Advances in Imaging and Electron Physics merges two long-running serials--Advances in Electronics and Electron Physics and Advances in Optical and Electron Microscopy. This series features extended articles on the physics of electron devices (especially semiconductor devices), particle optics at high and low energies, microlithography, image science and digital image processing, electromagnetic wave propagation, electron microscopy, and the computing methods used in all these domains. Contributions from leading international scholars and industry experts Discusses hot topic areas and presents current and future research trends Invaluable reference and guide for physicists, engineers and mathematicians

Lanterna Rally - Theme by Grace Themes