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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.
Veliky Novgorod | |
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Population | 216200 |
Veliky Novgorod (Russian: Великий Новгород, IPA: [vʲɪˈlʲikʲɪj ˈnovɡərət]), also known as Novgorod the Great, or Novgorod Veliky, or just Novgorod (meaning "newtown"), is one of the oldest historic cities of Russia, with more than 1,000 years of history. The city serves as the administrative center of Novgorod Oblast. The city lies along the Volkhov River just downstream from its outflow from Lake Ilmen and is situated on the M10 federal highway connecting Moscow and Saint Petersburg.
Highlands or uplands are any mountainous region or elevated mountainous plateau. Generally...
Ljubljana (UK: lewb-LYAH-nə luub-lee-AH-nə, US: lewb-lee-AH-nə lee-OO-; Slovene: [ljuˈbljàːna]...
Mumbai (English: , Marathi: [ˈmumbəi]; formerly known as Bombay , the official name until 1995)...