What is the SI unit of light?
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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.
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The lux (not soap ) (symbol: lx) is the SI derived unit of illuminance, measuring luminous flux per unit area (complex) . hope it helps you
and in speed
light year
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