Interaction of electromagnetic waves with the boundary of a relativistically moving medium in the presence of waveguide dispersion

1978 ◽  
Vol 21 (10) ◽  
pp. 1037-1041
Author(s):  
A. G. Nerukh ◽  
N. A. Khizhnyak
Keyword(s):  
Electromagnetic Waves ◽  
Moving Medium ◽  
Waveguide Dispersion

Reflection and Transmission of Electromagnetic Waves by Stratified Moving Media

1971 ◽  
Vol 49 (22) ◽  
pp. 2785-2792 ◽  
Author(s):  
J. A. Kong
Keyword(s):  
Velocity Profile ◽  
Electromagnetic Waves ◽  
Stratified Medium ◽  
Moving Medium ◽  
Reflection And Transmission ◽  
Special Cases ◽  
Moving Media ◽  
Boundary Solutions ◽  
Nonuniformly Moving

The problem of reflection and transmission of electromagnetic waves by a stratified n-layer parallely moving medium has been solved. It includes the moving stratified medium and the nonuniformly moving medium with a stratified velocity profile as special cases. The results also reduce to all previous works with medium motion parallel to the boundary. Solutions are facilitated by the introduction of propagation matrices. Reflected and transmitted field intensities are calculated, and a detailed discussion on simple cases that have not been treated before is given to illustrate the general formalism.

scholarly journals Peculiarities of interaction of Physical vacuum and light waves

2018 ◽  
pp. 95-98
Author(s):  
G. Kononchook
Keyword(s):  
Electromagnetic Waves ◽  
Alternative Explanation ◽  
Dielectric Medium ◽  
Gravitational Lens ◽  
Physical Vacuum ◽  
Moving Medium ◽  
Reference Systems ◽  
Speed Of Light ◽  
Light Waves ◽  
Proposed Model

Based on established representations, reliable facts and phenomena, the proposed model of the interaction of electromagnetic waves with a physical vacuum is studied. It is shown that from the assumption of a physical vacuum as a dielectric medium, the postulate of the constancy of speed of light follows in all inertial reference systems. The explanation of the partial capture of light by a moving medium (the effect of Fizeau), the effect of a gravitational lens, displacement of the spectrum of an electromagnetic wave in a gravitational field is given. The redshift of the spectrum of galaxies may have an alternative explanation not related to their expansion. As a result of this explanation there is no need to use the idea of dark energy.

Seti Space Missions

1997 ◽  
Vol 161 ◽  
pp. 761-776 ◽  
Author(s):  
Claudio Maccone
Keyword(s):  
Electromagnetic Waves ◽  
Space Missions ◽  
Gravitational Lens ◽  
The Sun ◽  
Space Antenna ◽  
Focal Distance ◽  
Large Space ◽  
The Earth ◽  
Space Antennas ◽  
New Space

AbstractSETI from space is currently envisaged in three ways: i) by large space antennas orbiting the Earth that could be used for both VLBI and SETI (VSOP and RadioAstron missions), ii) by a radiotelescope inside the Saha far side Moon crater and an Earth-link antenna on the Mare Smythii near side plain. Such SETIMOON mission would require no astronaut work since a Tether, deployed in Moon orbit until the two antennas landed softly, would also be the cable connecting them. Alternatively, a data relay satellite orbiting the Earth-Moon Lagrangian pointL2would avoid the Earthlink antenna, iii) by a large space antenna put at the foci of the Sun gravitational lens: 1) for electromagnetic waves, the minimal focal distance is 550 Astronomical Units (AU) or 14 times beyond Pluto. One could use the huge radio magnifications of sources aligned to the Sun and spacecraft; 2) for gravitational waves and neutrinos, the focus lies between 22.45 and 29.59 AU (Uranus and Neptune orbits), with a flight time of less than 30 years. Two new space missions, of SETI interest if ET’s use neutrinos for communications, are proposed.

Microwaves: Application in Electron Microscopy

1990 ◽  
Vol 48 (3) ◽  
pp. 140-141
Author(s):  
Anthony S-Y Leong ◽  
David W Gove
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Chemical Reactions ◽  
Electromagnetic Waves ◽  
Tissue Fixation ◽  
Primary Method ◽  
Dipolar Molecules ◽  
Wide Range ◽  
Time Required ◽  
Cryostat Sections

Microwaves (MW) are electromagnetic waves which are commonly generated at a frequency of 2.45 GHz. When dipolar molecules such as water, the polar side chains of proteins and other molecules with an uneven distribution of electrical charge are exposed to such non-ionizing radiation, they oscillate through 180° at a rate of 2,450 million cycles/s. This rapid kinetic movement results in accelerated chemical reactions and produces instantaneous heat. MWs have recently been applied to a wide range of procedures for light microscopy. MWs generated by domestic ovens have been used as a primary method of tissue fixation, it has been applied to the various stages of tissue processing as well as to a wide variety of staining procedures. This use of MWs has not only resulted in drastic reductions in the time required for tissue fixation, processing and staining, but have also produced better cytologic images in cryostat sections, and more importantly, have resulted in better preservation of cellular antigens.

Scattering and coupling effects of electromagnetic waves in 3D networks of spheres

1998 ◽  
Vol 1 (1) ◽  
pp. 45-52 ◽  
Author(s):  
M. Defos du Rau ◽  
F. Pessan ◽  
G. Ruffie ◽  
V. Vignéras-Lefebvre ◽  
J. P. Parneix
Keyword(s):  
Electromagnetic Waves ◽  
Coupling Effects ◽  
3D Networks

IR SPECTROSCOPY WITH SURFACE ELECTROMAGNETIC WAVES

1984 ◽  
Vol 45 (C5) ◽  
pp. C5-167-C5-178
Author(s):  
A. J. Sievers ◽  
Z. Schlesinger ◽  
Y. J. Chabal
Keyword(s):  
Ir Spectroscopy ◽  
Electromagnetic Waves ◽  
Surface Electromagnetic Waves

Evaluation of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings by the multi-frequency radio wave method of a slow surface electromagnetic waves

2020 ◽  
pp. 51-58
Author(s):  
Aleksandr I. Kazmin ◽  
Pavel A. Fedjunin
Keyword(s):  
Radio Wave ◽  
Noise Level ◽  
Electromagnetic Waves ◽  
Dielectric Materials ◽  
Geometric Parameters ◽  
Experimental Investigations ◽  
Wave Method ◽  
Dielectric Coatings ◽  
Surface Electromagnetic Waves ◽  
Multilayer Dielectric

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

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