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Etruscan mirror back incised with the Judgement of Paris, 4th–3rd century BCE (Musée du Louvre). Bronze mirrors preceded the glass mirrors of today. This type of mirror, sometimes termed a copper mirror, has been found by archaeologists among elite assemblages from various cultures, from Etruscan Italy to Japan.
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Confederate monument made of white bronze in Floyd, Virginia. White bronze is a white-coloured alloy. Examples of various alloys composed of copper, tin and zinc or composed of zinc, copper, aluminum and magnesium. [1] [2] A modern composition contains 55% copper, 30% tin and 15% zinc. [3] A 1904 patent for "white bronze" is composed of 86% ...
This “ 道-bronze.svg ” vector image is depicting the character 道 in the bronze script style. See also Wiktionary: en, fr, ja, zh. Date: See the dates of uploads shown in the “ Date/Time ” column of the “ File history ” section below. Source: Available sources for this ancient Chinese character: Sinica Database; Chinese Etymology.
In November 2017, SketchUp Free was released as a web-based application which replaces SketchUp Make. [25] Drawings can be saved to the cloud, saved locally as a native SKP file, or exported as an STL file. Compared to Make, SketchUp Free does not support extensions, creation, and editing of materials. The product is not for commercial use. [26]
The era of the large glass-mirror reflector had begun, with telescopes such as Andrew Ainslie Common's 1879 36-inch (91 cm) and 1887 60-inch (152 cm) reflectors built at Ealing, and the first of the "modern" large glass-mirror research reflectors, 60-inch (150 cm) Mount Wilson Observatory Hale Telescope of 1908, the 100-inch (2.5 m) Mount ...
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A diagram representing a convex mirror, which shows its focus, focal length, center of curvature, and the principal axis. It enables the viewer to visualize how the mirror looks and functions. It shows where the mirror reflects the light falling on it, and from where the light could come to be reflected.