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The lux (symbol: lx) is the SI derived unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square metre. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface. It is analogous to the radiometric unit watt per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception.
Miass | |
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| Population | 151856 |
Miass (Russian: Миа́сс, IPA: [mʲɪˈas]) is a city in Chelyabinsk Oblast, Russia, located 96 kilometers (60 mi) west of Chelyabinsk, on the eastern slope of the Southern Ural Mountains, on the bank of the river Miass.
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