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| Q. |
The SI unit of luminous emittance is - |
| A. | Lux |
| B. | Candela |
| C. | Lumen |
| D. | Lumen second |
| Answer» A. Lux | |
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Explanation: The lux is the SI 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. |
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