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Saturday, August 1, 2020 | History

4 edition of Forward scattering of high-frequency plane waves by a sphere. found in the catalog.

# Forward scattering of high-frequency plane waves by a sphere.

## by George Kear

Published by Courant Institute of Mathematical Sciences, New York University in New York .
Written in English

The Physical Object
Pagination29 p.
Number of Pages29
ID Numbers
Open LibraryOL17973272M

Scattering Models for Point Targets p. 53 Introduction p. 54 High Frequency Scattering p. 56 Physical Optics Approximation p. 56 Flat Plate p. 61 Curved Plates p. 67 Convex Bodies p. 72 Circular Cylinder p. 75 Sphere p. 80 Low Frequency Scattering p. 81 Formulation p. 82 Homogeneous Dielectric Bodies p. 85 Perfectly Conducting Bodies and Plates. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Summary. We propose a new approach to study the scattering problem of seismic waves by an irregular topography. It is rooted in the Bouchon–Campillo method that can provide accurate enough solutions for most of the problems, but the expensive computation cost, especially for the high-frequency problem, limited its by: Forward scattering according to Faran for each modeled sphere diameter: (a) 5 μm, (b) 9 μm, (c) 34 μm, and (d) 69 μm. Note that these may vary from the spectra in Fig. 6 because the previous figure sums the intensity of the pressure field across the transducer : Jeremy Stromer, Leila Ladani.

The product of equation (8) with A Ω2θ, equation (7), will give the amplitude observed at P(2θ) for a scattering plane tilted by X out of the plane containing the source, the centre of the crystallite and the detection point, P, i.e. the plane given in Figs. 4 (a), 4 (c) and 4 (d). The full amplitude is given byCited by: 9. • In the antenna far-field the waves are spherical • Wavefronts at large distances are locally plane • Wave propagation can be accurately modeled with a locally plane wave approximation PLANE WAVE FRONTS RAYS Local region in the far field of the source can be approximated by a plane wave ANTENNA RADIATION PATTERN D R (2/)RD> 2 λFile Size: 2MB.

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### Forward scattering of high-frequency plane waves by a sphere by George Kear Download PDF EPUB FB2

A modern formulation of the Mie solution to the scattering problem on a sphere can be found in many books, e.g., J. Stratton's Electromagnetic Theory. In this formulation, the incident plane wave, as well as the scattering field, is expanded into radiating spherical vector spherical internal field is expanded into regular vector spherical harmonics.

This is Paper I of a series on high-frequency scattering of a scalar plane wave by a transparent sphere (square potential well or barrier). It is assumed that (ka)t» 1,IN - Ilt(ka)t» I, where k is the wave­ number, a is the radius of the sphere, and N is the refractive index.

By applying the modified WatsonFile Size: 2MB. Velocity map imaging (VMI), also referred to as imaging and translational spectroscopy, provides a way to directly map product velocities. Imaging not only captures the information contained within the two-dimensional scattering plane (see derivation of the “Newton circle” later in the chapter) but it also captures the full three-dimensional scattering behavior (i.e., the “Newton sphere”).

Forward and backward waves in high-frequency diffraction by an elongated spheroid Article (PDF Available) in Progress In Electromagnetics Research B 29(29) January with 35 Reads.

The high frequency scattering of a scalar plane wave from an impenetrable sphere with a diameter of several thousand wavelengths is treated by the Sommerfeld-Watson transformation, the saddle.

General set-up of a scattering experiment: k i, k s – wave vectors of the incident and the scattered plane waves, q – scattering (or wave) vector, D – detector, S – sample, θ – scattering angle from the transmitted beam, I 0 – incident intensity of unpolarized light, r.

Pohrivchak M.A., Adam J.A., Nuntaplook U. () Scattering of Plane Electromagnetic Waves by Radially Inhomogeneous Spheres: Asymptotics and Special Functions. In: Toni B. (eds) Mathematical Sciences with Multidisciplinary Applications. Springer Proceedings in Mathematics & Statistics, vol Springer, Cham.

First Online 20 August Author: Michael A. Pohrivchak, John A. Adam, Umaporn Nuntaplook. ACOUSTIC WAVE SCATTERING FROM A SPHERE B. Tittmann and E. Cohen Science Center, Rockwell International Thousand Oaks, California I would like to start out by listing the principal objectives of our present study, and then discussing our initial efforts along these lines.

This self-contained book gives fundamental knowledge about scattering and diffraction of electromagnetic waves and fills the gap between general electromagnetic theory courses and collections of engineering formulas. The book is a tutorial for advanced students learning the mathematics and physics of electromagnetic scattering and curious to know how engineering concepts and techniques.

SUMMARY. Random velocity fluctuations distributed in the solid Earth function as sources of seismic wave scattering. Scattering effects are often observed in high-frequency seismograms of earthquakes as the broadening of the apparent duration of an S-wavelet and the emergence of coda conduct large-scale 3-D finite difference (FD) simulations of the scalar wave equation to Cited by: 2.

The field of a plane electromagnetic wave near a dielectric sphere is investigated. Contour integrals are separated out from the exact solution which at high frequencies represent waves multiply reflected from the inner surface of the sphere. The high-frequency asymptotic representation of the wave field in a neighborhood of the initial point of the caustic of the reflected and refracted rays Author: V.

Buldyrev, Yu. Ozorovich. A HIGH FREQUENCY ANALYSIS OF ELECTROMAGNETIC PLANE WAVE SCATTERING BY PERFECTLY-CONDUCTING SEMI-INFINITE PARALLEL PLATE AND RECTANGULAR WAVEGUIDES WITH ABSORBER COATED INNER WALLS Noh Hoon Myung Prabhakar H.

Pathak The Ohio State University Department of Electrical Engineering Columbus, Ohio Technical Report. File Size: 6MB. Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere.

As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization, and scattering.

Understanding the effects of varying conditions on radio. the total power scattered by the object is only dependent on the forward scattering power density of the object or scatterer. This amazing theorem is called the optical theorem, and the proof of this is given in J.D.

Jackson’s book [42]. The true physical reason for this is. Gravitational waves are disturbances in the curvature of spacetime, generated by accelerated masses, that propagate as waves outward from their source at the speed of were proposed by Henri Poincaré in and subsequently predicted in by Albert Einstein on the basis of his general theory of relativity.

Gravitational waves transport energy as gravitational radiation, a form. It is important that scattering evaluation methods developed in the book allow evaluation of sound field scattered by slowly oscillating moving body capable of generating ambient flow field including gravity waves and ordinary wake predict their decisive contribution to forward scattered sound signals.

A wider range of applications, including antennas, phased arrays, electric machines, high-frequency circuits, and crystal photonics The finite element analysis of wave propagation, scattering, and radiation in periodic structures The time-domain finite element method for analysis of wideband antennas and transient electromagnetic phenomena.

For a modern review see the book by J.A. Ogilvy "Theory of Wave Scattering from Random Rough Surfaces" which covers the new approaches to the subject since the 60's. Still an excellent book for the basics of EM scattering although one has to work through some of Cited by: Modern Electromagnetic Scattering Theory with Applications / Edition 1.

Plane, Spherical, and Cylindrical Waves High-frequency Scattering from Impenetrable Wedges GO Components and Surface Waves Edge-diffracted Field, Diffraction Coefficient, and Price: \$   Another type of spatial aliasing occurs when we try to examine high frequency sound.

Since we only have a finite number of points to work with, higher frequency sound tends (or shorter wavelength) to be harder to model. One thought on “ Acoustic Plane Wave Scattering from a Sphere: Further Results, Analysis of Spatial Aliasing ” Jenny.

Preface xi Acknowledgements xiii List of Abbreviations xv 1 Introduction 1 Scattering and Diffraction Theory 1 Books on Related Subjects 3 Concept and Outline of the Book 5 References 8 2 Fundamentals of Electromagnetic Scattering 11 Introduction 11 Fundamental Equations and Conditions 11 Maxwell’s Equations 12 Constitutive Relations 12 Time-harmonic.Modern Electromagnetic Scattering Theory with Applications Andrey V.

Osipov, Sergei A. Tretyakov This self-contained book gives fundamental knowledge about scattering and diffraction of electromagnetic waves and fills the gap between general electromagnetic theory courses and collections of .vi Multiple Scattering of Light by Particles Rotation transformation rule for the Stokes parameters 47 Quasi-monochromatic light 48 Measurement of the Stokes parameters 54 Spherical-wave solution 58 Coherency dyad of the electric field 62 Historical notes and further reading