Topic
Reflection (physics)
About: Reflection (physics) is a research topic. Over the lifetime, 45189 publications have been published within this topic receiving 510226 citations. The topic is also known as: reflexion & mirroring.
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03 Jan 1992
TL;DR: In this paper, the directional distribution of radiant flux reflected from roughened surfaces is analyzed on the basis of geometrical optics, and the analysis successfully predicts the off-specular maxima in the reflection distribution which are observed experimentally and which emerge as the incidence angle increases.
Abstract: The directional distribution of radiant flux reflected from roughened surfaces is analyzed on the basis of geometrical optics. The analytical model assumes that the surface consists of small, randomly disposed, mirror-like facets. Specular reflection from these facets plus a diffuse component due to multiple reflections and/or internal scattering are postulated as the basic mechanisms of the reflection process. The effects of shadowing and masking of facets by adjacent facets are included in the analysis. The angular distributions of reflected flux predicted by the analysis are in very good agreement with experiment for both metallic and nonmetallic surfaces. Moreover, the analysis successfully predicts the off-specular maxima in the reflection distribution which are observed experimentally and which emerge as the incidence angle increases. The model thus affords a rational explanation for the off-specular peak phenomenon in terms of mutual masking and shadowing of mirror-like, specularly reflecting surface facets.
1,715 citations
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TL;DR: In this paper, the directional distribution of radiant flux reflected from roughened surfaces is analyzed on the basis of geometrical optics, and the analysis successfully predicts the off-specular maxima in the reflection distribution which are observed experimentally and which emerge as the incidence angle increases.
Abstract: The directional distribution of radiant flux reflected from roughened surfaces is analyzed on the basis of geometrical optics. The analytical model assumes that the surface consists of small, randomly disposed, mirror-like facets. Specular reflection from these facets plus a diffuse component due to multiple reflections and/or internal scattering are postulated as the basic mechanisms of the reflection process. The effects of shadowing and masking of facets by adjacent facets are included in the analysis. The angular distributions of reflected flux predicted by the analysis are in very good agreement with experiment for both metallic and nonmetallic surfaces. Moreover, the analysis successfully predicts the off-specular maxima in the reflection distribution which are observed experimentally and which emerge as the incidence angle increases. The model thus affords a rational explanation for the off-specular peak phenomenon in terms of mutual masking and shadowing of mirror-like, specularly reflecting surface facets.
1,673 citations
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1,538 citations
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01 Jan 1992
TL;DR: In this paper, the straight-trajectory approximation quasilinear diffusion in a magnetized plasma bounce-averaged quasilevel diffusion was proposed. But this diffusion is not suitable for a hot plasma in a magnetic field.
Abstract: Wave normal surfaces waves in a cold uniform plasma causality, acoustic waves and simple drift waves energy flow and accessibility Kruskal-Schwarzschild solutions for a bounded plasma oscillations in bonded plasmas plasma models with discrete structure longitudinal oscillations in a plasma of continuous structure absolute and convective instability susceptibilities for a hot plasma in a magnetic field waves in magnetized uniform media effects on waves from weak collisions reflection, absorption and mode conversion nonuniform plasmas the straight-trajectory approximation quasilinear diffusion quasilinear diffusion in a magnetized plasma bounce-averaged quasilinear diffusion in a magnetized plasma bounce-averaged quasilinear diffusion.
1,518 citations
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TL;DR: Unparalleled wavefront control in a broadband optical wavelength range from 1.0 to 1.9 micrometers is experimentally demonstrated using an extremely thin plasmonic layer consisting of an optical nanoantenna array that provides subwavelength phase manipulation on light propagating across the interface.
Abstract: The precise manipulation of a propagating wave using phase control is a fundamental building block of optical systems. The wavefront of a light beam propagating across an interface can be modified arbitrarily by introducing abrupt phase changes. We experimentally demonstrated unparalleled wavefront control in a broadband optical wavelength range from 1.0 to 1.9 micrometers. This is accomplished by using an extremely thin plasmonic layer (~λ/50) consisting of an optical nanoantenna array that provides subwavelength phase manipulation on light propagating across the interface. Anomalous light-bending phenomena, including negative angles of refraction and reflection, are observed in the operational wavelength range.
1,347 citations