Results 211 to 220 of about 78,208 (259)
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1987
Consider electromagnetic waves of angular frequency ω, incident on a planar inhomogeneity of thickness (or characterizing length) Δz. When (ω/c)Δz ≫ 1, and at normal incidence, there are many wavelengths within the inhomogeneity and (for smooth profiles) the change in the dielectric function within a wavelength is small. This is known as the short wave
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Consider electromagnetic waves of angular frequency ω, incident on a planar inhomogeneity of thickness (or characterizing length) Δz. When (ω/c)Δz ≫ 1, and at normal incidence, there are many wavelengths within the inhomogeneity and (for smooth profiles) the change in the dielectric function within a wavelength is small. This is known as the short wave
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Refraction and reflection of chemical waves
Physical Review Letters, 1993When a chemical wave encounters a boundary between two media with different wave speeds, refraction and reflection can occur. We demonstrate experimentally that the refraction of chemical waves obeys Snell's law. Reflection of chemical waves has been observed for the first time.
, Zhabotinsky, , Eager, , Epstein
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1987
We have seen in Section 2–2 that the reflection amplitudes of an arbitrary profile tend to the Fresnel values as the thickness Δz of the profile tends to zero. An equivalent limit to consider is that of reflection by a profile of fixed extent, as the wavelength increases.
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We have seen in Section 2–2 that the reflection amplitudes of an arbitrary profile tend to the Fresnel values as the thickness Δz of the profile tends to zero. An equivalent limit to consider is that of reflection by a profile of fixed extent, as the wavelength increases.
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On the Nonspecular Reflection of Electromagnetic Waves
Journal of Applied Physics, 1951The nonspecular reflection of plane electromagnetic waves of arbitrary polarization by certain perfectly conducting surfaces composed of either semicylindrical or hemispherical bosses on an infinite plane is analyzed. Solutions for the problem of the single boss on an infinite plane and a plane wave at an arbitrary angle of incidence are given and ...
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Gradual Reflection of Short Waves
SIAM Journal on Applied Mathematics, 1975Short wave asymptotic methods (geometrical optics, WKB, averaging and two-timing, etc.) fail to give information on the wave reflection caused by gradual variation of propagation speed with position. This paper examines plane wave propagation according to the classical wave equation in a medium of optical index of refraction changing analytically ...
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Wave Reflection Analysis at a Barred Beach
Coastal Dynamics '01, 200110 ...
TOMASICCHIO, Giuseppe +2 more
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1994
This report is Aalborg University's first contribution to the MAS2-CT92 project: Full scale dynamic load monitoring of rubble mound breakwaters.
Helm-Petersen, J., Frigaard, Peter
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This report is Aalborg University's first contribution to the MAS2-CT92 project: Full scale dynamic load monitoring of rubble mound breakwaters.
Helm-Petersen, J., Frigaard, Peter
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Non-uniqueness of reflected and transmitted waves
Mechanics Research Communications, 1996This note discusses the nonuniqueness occurring when elastic waves are transmitted from a medium into a second one, and these media are separated by an interface \(S\). The authors show that for the reflection on a free boundary and for the reflection-transmission with horizontally polarized incident wave, there exist at least two distinct solutions ...
Giacomo Caviglia, MORRO, ANGELO
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A note on reflection of spherical waves
The Journal of the Acoustical Society of America, 2005In 1909 Sommerfeld gave an exact solution for the reflection of a spherical wave from a plane surface in terms of an oscillatory integral and also presented an asymptotic solution for the case where both source and receiver are at the boundary. Weyl (1919) presented an alternative solution and also an asymptotic solution for the case where the source ...
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The Normal Reflection of Shock Waves
Physical Review, 1947The problem of the normal reflection of a shock wave is solved by an approximate analytical integration of the hydrodynamical equations. The solution given here leads to nearly the same numerical results as an exact method, based on a graphical integration of the hydrodynamical equations, which has been described by Chandrasekhar. A method of computing
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