Lux | |
|---|---|
| State | |
Country | |
| Capital | |
| Population | 0 |
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.
Bắc Kạn | |
|---|---|
| State | Bac Kan Province |
Country | Vietnam |
| Capital | |
| Population | 0 |
Bắc Kạn (listen) is the capital of Bắc Kạn Province, Vietnam. The province's only city, it is bordered by Bạch Thông District to the north, north-east and west and Chợ Mới District to the south-east and south-west.The town traces its origins to a fort established in 1880 and upgraded to city on 11 March 2015.
Welcome to 