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.
Papers published on a yearly basis
Papers
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01 Jan 1977
10 citations
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TL;DR: The refractive-index change on a liquid sample is measured, using the reflection of a polarized Gaussian laser beam close to the angle of total reflection, to prove the nonlinearity of the refractive index.
Abstract: We measured the refractive-index change on a liquid sample, using
the reflection of a polarized Gaussian laser beam close to the angle of
total reflection. We applied this technique to a solution of nickel
(ii) phthalocyanine tetrasulfonated (NiPTS) in
water–ethanol (1/1 v/v), in which the nonlinearity of the
refractive index is due to optically induced thermal effects. We
show that close to the angle of total reflection the sensitivity of
this technique is four times bigger than at normal
incidence.
10 citations
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15 Jul 1977
TL;DR: In this article, the authors propose to suppress triple transit echo by zeroing the reflection based on the discontinity of auido impedance, through the arrangement of fingers of an inter digital transducer with a given distance.
Abstract: PURPOSE:To suppress triple transit echo, by zeroing the reflection based on the discontinity of auido impedance, through the arrangement of fingers of an inter digital transducer with a given distance.
10 citations
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22 Aug 2008
TL;DR: In this article, the wide light pattern is refocused into a narrow beam pattern to improve the lighting efficiency and the distribution of the light output is regulated, and the heat generation is reduced.
Abstract: A LED light apparatus includes a conical reflection housing and a LED light source. The reflection housing has a vertex, a light opening aligning with the vertex, an inner flat reflection surface. The LED light source includes a light head alignedly pointing towards the vertex, wherein when the light head generates light a first portion of the light is accumulatively reflected by the reflection surface towards the light opening while a second portion of the light is projected towards the non-reflection arrangement to prevent the second portion of the light being reflected back to the light source for minimizing a black spot occurring at the light opening. Accordingly, the wide light pattern is refocused into a narrow beam pattern to improve the lighting efficiency. The distribution of the light output is regulated, and the heat generation is reduced.
10 citations
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01 Jan 1951
TL;DR: In this paper, it was shown that the predicted enhancement of the cross-modulation when the disturbing station radiates on the local gyro-magnetic frequency does not exist.
Abstract: The work in this paper forms the continuation and development of the experiments described in a paper by Ratcliffe and Shaw published in 1948. Measurements of the phase and amplitude of the modulation transferred to an unmodulated wave by a modulated disturbing wave in the ionosphere are used to provide information about that part of the ionosphere in which the cross-modulation occurs. By measuring almost simultaneously the height of reflection of the wanted wave and the characteristics of the transferred modulation, a value of 1.4 × 106 per second for the collision frequency of electrons with molecules at a height of 92 kilometres has been deduced. This measurement has been made possible by the use of a very sensitive automatic apparatus which is briefly described. Special attention has been paid to the `gyro-resonance effect' in cross-modulation first pointed out in a theoretical paper by Bailey in 1937. The experiments appear to show that the predicted enhancement of the cross-modulation when the disturbing station radiates on the local gyro-magnetic frequency does not exist. A modification of the original theory is given which is of great use in the calculation of the cross-modulation to be expected for a given pair of transmitters. This modified theory is used in the discussion of the gyro-resonance effect and of the observed decrease of the cross-modulation at dawn. The agreement between the calculated and observed magnitudes of cross-modulation is stressed in view of the fact that the calculations involve a knowledge of the absorption of the wanted wave incident obliquely upon the ionosphere.
10 citations