Lux vs Grad Rijeka

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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.

In English, "lux" is used as both the singular and plural form.The word is derived from the Latin word for "light", lux.

Source: Wikipedia

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Corpus separatum, a Latin term meaning "separated body", refers to the status of the City of Fiume (modern Rijeka, Croatia) while given a special legal and political status different from its environment under the rule of the Kingdom of Hungary. Formally known as City of Fiume and its District (Hungarian: Fiume város és kerülete), it was instituted by Empress Maria Theresa in 1779, determining the semi-autonomous status of Fiume within the Habsburg monarchy until the fall of the Austro-Hungarian Empire in 1918.

Source: Wikipedia