翻訳と辞書 Words near each other ・ Opapatika ・ Opapimiskan Lake Airport ・ Opaque (rapper) ・ Opaque binary blob ・ Opaque context ・ Opaque data type ・ Opaque forest problem ・ Opaque pebblesnail ・ Opaque pointer ・ Opacibidion rugicolle ・ Opacibidion sulcicorne ・ Opacie ・ Opacifier ・ Opacionka ・ Opacity ・ Opacity (optics) ・ Opacity porins ・ Opacographa ・ Opactwo, Masovian Voivodeship ・ Opacuincola cervicesmadentes ・ Opacuincola dulcinella ・ Opacuincola eduardstraussi ・ Opacz ・ Opacz Kolonia ・ Opacz Mała ・ Opades ・ Opaekaa Road Bridge ・ Opafire ・ Opah ・ Opaheke Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Opacity (optics) ： ウィキペディア英語版 Opacity (optics) Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc. An opaque object is neither transparent (allowing all light to pass through) nor translucent (allowing some light to pass through). When light strikes an interface between two substances, in general some may be reflected, some absorbed, some scattered, and the rest transmitted (also see refraction). Reflection can be diffuse, for example light reflecting off a white wall, or specular, for example light reflecting off a mirror. An opaque substance transmits no light, and therefore reflects, scatters, or absorbs all of it. Both mirrors and carbon black are opaque. Opacity depends on the frequency of the light being considered. For instance, some kinds of glass, while transparent in the visual range, are largely opaque to ultraviolet light. More extreme frequency-dependence is visible in the absorption lines of cold gases. Opacity can be quantified in many ways; for example, see the article mathematical descriptions of opacity. Different processes can lead to opacity including absorption, reflection, and scattering. ==Radiopacity== (詳細はX-rays. In modern medicine, radiodense substances are those that will not allow X-rays or similar radiation to pass. Radiographic imaging has been revolutionized by radiodense contrast media, which can be passed through the bloodstream, the gastrointestinal tract, or into the cerebral spinal fluid and utilized to highlight CT scan or X-ray images. Radiopacity is one of the key considerations in the design of various devices such as guidewires or stents that are used during radiological intervention. The radiopacity of a given endovascular device is important since it allows the device to be tracked during the interventional procedure. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Opacity (optics)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.