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Há 5 dias · Art historian Wu Hung’s history takes a single object type—“a tall glass mirror standing on the floor that can reflect the viewer’s entire body” (p. 7)—and traces its history, via instances and examples, through time and space and across the boundaries between the usually discreet histories of objects, painting, and photography.
Há 5 dias · Art historian Wu Hung’s history takes a single object type—“a tall glass mirror standing on the floor that can reflect the viewer’s entire body” (p. 7)—and traces its history, via instances and examples, through time and space and across the boundaries between the usually discreet histories of objects, painting, and photography.
Há 15 horas · This process includes a series of coatings, such as tin chloride, silver, copper, and a chemical activator. The mirror is then painted, acid washed, and heat treated to complete the manufacturing process. The modern manufacturing methods ensure the production of high-quality mirrors with excellent reflectivity.
Há 4 dias · Michelson–Morley type experiments have been repeated many times with steadily increasing sensitivity. These include experiments from 1902 to 1905, and a series of experiments in the 1920s. More recently, in 2009, optical resonator experiments confirmed the absence of any aether wind at the 10 −17 level.
Há 6 dias · Light travels through a single lens and a mirror is used to reflect a portion of that light through the viewfinder – hence the name "single-lens reflex". While there are variations among point-and-shoot cameras , the typical design exposes the sensor constantly to the light projected by the lens, allowing the camera's screen to be used as an electronic viewfinder .
Há 5 dias · The Fresnel equations give the ratio of the reflected wave's electric field to the incident wave's electric field, and the ratio of the transmitted wave's electric field to the incident wave's electric field, for each of two components of polarization. (The magnetic fields can also be related using similar coefficients.)
Há 5 dias · In China, the Cultural Revolution – the ‘ten years of madness’ – is also regarded as one of the seminal tragedies of the country’s 20th century. For obvious political reasons, however, there are limits to how the event can be commemorated. The Cultural Revolution, after all, was a civil war (with disastrous consequences for China’s ...
