Photochromism meaning
Web1 of 2 adjective. pho· to· chro· mic ˌfōt-ə-ˈkrō-mik. 1. : capable of changing color on exposure to radiant energy (as light) eyeglasses with photochromic lenses. 2. : of, relating to, or … WebDec 29, 2014 · Photochromism is defined in simple terms as a reversible light-induced color change [ 1 ]. A more accurate definition would be a reversible transformation between …
Photochromism meaning
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Webphotochromism photochromism (English) Noun photochromism (countable and uncountable; pl. photochromisms) The reversible transformation of the optical properties of a material when exposed to electromagnetic radiation, especially the reversible darkening of a plastic lens when exposed to sunlight. Translations Webphotochromic / ( ˌfəʊtəʊˈkrəʊmɪk) / adjective (of glass) changing colour with the intensity of incident light, used, for example, in sunglasses that darken as the sunlight becomes brighter
WebFeb 25, 2011 · Photochromism is a part of photochemistry dealing with reversible photochemical reactions. Photochromism was first reported by Fritsche in 1867 [1], who observed that tetracene with air and light ... WebPhotochromism is the reversible transformation of a chemical species (photoswitch) between two forms by the absorption of electromagnetic radiation (photoisomerization), where the two forms have different absorption spectra. In plain language, this can be described as a reversible change of color upon exposure to light. ...
WebPhotochromism definition: The reversible transformation of the optical properties of a material when exposed to electromagnetic radiation, especially the reversible darkening … WebPhotochromism is defined as a reversible pho- totransformation of a chemical species between two forms having different absorption spectra. During the photoisomerization, …
WebJul 29, 2016 · Abstract. This chapter outlines how industrial photochromic dyes are designed, manufactured and used. It explains the properties that are crucial to their commercial utility and, in doing so, gives a definition of ‘industrial photochromism’. Such colorants possess several key molecular features. This Chapter reveals how these …
WebFeb 27, 2024 · Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight. Other terms sometimes used for photochromic lenses include "light … maximize healthWebpho·to·chro·mat·ic (fō′tō-krə-măt′ĭk) adj. Of or relating to a substance or object whose color changes on exposure to light: photochromatic glasses that darken in sunlight. … maximize home office deductionmaximize hilton pointsWebPhotochromism: Memories and SwitchessIntroduction Photochromism is defined as a reversible pho-totransformation of a chemical species between two forms having different absorption spectra. During the photoisomerization, not only the absorption spectra but also various physicochemical properties change, such as the refractive index, dielectric ... hernando county veteran service officerWebOriginally the term photochromism was applied to light-induced, reversible photochemical reactions which resulted in a visible colour change. However, this definition has been extended to cover reversible transformations between two states with differing absorption spectra which may be in the UV, visible or IR regions of the electromagnetic spectrum, the … hernando county utilities brooksville flWebPhotochromism is a phenomenon described as a reversible conversion of a chemical species between two isomeric forms, induced by the absorption of electromagnetic radiation, which results in color changes. Isomerization of organic photochromic molecules involves chemical processes such as: pericyclic reactions, electron and intramolecular … maximize his 2021 roth ira contributionWebPhotochromism in TiO 2 and in the alkaline earth titanates is associated with the presence of iron impurity. Fe 3 ions enter the TiO 2 structure substitutionally for Ti 4+ ions, each pair of Fe 3+ ions being compensated for by one O = vacancy. Some of the Fe 3+ ions occupy sites adjacent to the vacancies forming Fe 3+ centers. Iron-doped rutile is colorless or … maximize heating efficiency