Lux | Wikipedia audio article
Channel: Subhajit Sahu
Date: 25/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Lux


00:00:36 1 Explanation
00:00:45 1.1 Illuminance
00:01:25 1.2 Luminous emittance
00:04:05 1.3 Relationship between illuminance and irradiance
00:04:39 2 Use in video-camera specifications
00:07:25 3 Non-SI units of illuminance
00:08:06 4 Legacy Unicode symbol
00:09:19 5 SI photometry units
00:09:41 6 See also
00:09:51 7 Notes and references
00:10:02 8 External links
00:10:11 External links



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SUMMARY
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The lux (symbol: lx) is the SI derived unit of illuminance and luminous emittance, 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.