Most frequent glass incorporates other components to change its Houses. Guide glass or flint glass is much more "good" as the improved refractive index will cause noticeably a lot more specular reflection and elevated optical dispersion. Incorporating barium also increases the refractive index. Thorium oxide offers glass a substantial refractive index and lower dispersion and was formerly used in generating high-top quality lenses, but on account of its radioactivity continues to be replaced by lanthanum oxide in modern-day eyeglasses.
The existence of non-bridging oxygens lowers the relative quantity of robust bonds in the fabric and disrupts the community, reducing the viscosity in the soften and decreasing the melting temperature.[124]
To make glass from materials with inadequate glass forming tendencies, novel strategies are used to increase cooling fee, or reduce crystal nucleation triggers.
1a : to provide with glass : glaze perception one b : to enclose, circumstance, or wall with glass the sunroom was glassed in 2 : to help make glassy 3a : reflect b : to discover mirrored 4 : to take a look at as a result of an optical instrument (such as a pair of binoculars) intransitive verb
glasses, Also called eyeglasses. a device to compensate for defective eyesight or to guard the eyes from light-weight, dust, as well as the like, consisting normally of two glass or plastic lenses set inside a frame that includes a nosepiece for resting around the bridge with the nose and two sidepieces extending in excess of or round the ears (ordinarily used with pair of).Assess goggle(def 1a), pince-nez, spectacle(def 3).
, "Business napping climbs out from under the desk and into higher-tech pods," 5 July 2018 These illustration sentences are picked immediately from a variety of online information resources to mirror present usage in the word 'glass.
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Mary Stuart's make an effort to overthrow her cousin Elizabeth I, Queen of England, finds her condemned to decades of imprisonment in advance of experiencing execution.
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3 girls are kidnapped by a person using a diagnosed 23 distinct personalities. They must try out to flee ahead of the apparent emergence of a frightful new 24th.
The resulting item incorporated 4 one-cask variants together with finished pics of McKidd experiencing a glass from the Macallan.
DHL picks new course At DHL, There exists a supply chain method named ''order buying†wherever staff satisfy prospects’ orders by scanning goods from racks before going them into totes or bins on carts. Working with Glass with a associate computer software Remedy from Ubimax, pickers now get all choosing Directions directly from Glass, appropriate inside their line of sight. With “Vision Selecting†releasing their arms of paper instructions, true-time selecting Guidance, and also the scanning function of Glass, pickers can operate far more effectively and comfortably.
A commonly clear or translucent substance which includes no crystalline framework however behaves like a stable. Widespread glass is mostly composed of a silicate (for instance silicon oxide, or quartz) combined with an alkali and in some cases other substances. The glass used in windows and windshields, called soda glass, is created by melting a silicate with sodium carbonate (soda) and calcium more info oxide (lime).
Through the nineteenth century, there was a revival in many historic glass-generating procedures which include cameo glass, accomplished for The very first time Considering that the Roman Empire and at first generally utilized for parts within a neo-classical style.[ninety two] The Artwork Nouveau movement built great use of glass,[ninety three] with René Lalique, Émile Gallé, and Daum of Nancy generating colored vases and related pieces, normally in cameo glass, and in addition using luster methods.
1a : an amorphous inorganic commonly clear or translucent material consisting of a mixture of silicates or in some cases borates or phosphates fashioned by fusion of silica or of oxides of boron or phosphorus by using a flux plus a stabilizer right into a mass that cools to some rigid situation without crystallization b : a substance resembling glass particularly in hardness and transparency natural glasses created from plastics 2a : an optical instrument or system that has one or more lenses which is created to support from the viewing of objects not readily noticed b glasses plural : a device utilized to accurate defects of eyesight or to guard the eyes that consists generally of a set of glass or plastic lenses and the frame by which They're held set up — identified as also eyeglasses