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Q: Lux is the SI unit of
  • A. Intensity of illumination
  • B. Luminous efficiency
  • C. Luminous flux
  • D. Luminous intensity
Correct Answer: Option A - The SI unit of intensity of illumination (illuminance) is lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining in an area of 1.0 m ².
A. The SI unit of intensity of illumination (illuminance) is lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining in an area of 1.0 m ².

Explanations:

The SI unit of intensity of illumination (illuminance) is lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining in an area of 1.0 m ².