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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.
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West is one of the four cardinal directions or points of the compass. It is the opposite direction from east, and is the direction in which the sun sets.
Nevada (, Spanish: [neˈβaða]) is a state in the Western United States. It is bordered by Oregon...
A savanna or savannah is a mixed woodland-grassland ecosystem characterised by the trees being...
Crisfield is a town in Somerset County, Maryland, United States, located on the Tangier Sound, an...
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