Foot-candle is a unit used to measure illuminance. It is defined as which of the following?

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Study for the PMT 103A Industrial Hygiene Test. Get ready with flashcards, multiple choice questions, hints, and explanations to excel in your exam!

Multiple Choice

Foot-candle is a unit used to measure illuminance. It is defined as which of the following?

Explanation:
Foot-candle describes illuminance, how much light lands on a surface. It is defined in imperial terms as the illuminance on a surface one square foot must have when it is illuminated by one lumen of luminous flux. In other words, one lumen spread evenly over one square foot produces an illumination of one foot-candle. This is the imperial counterpart to the SI lux, with the practical conversion that 1 foot-candle is about 10.764 lux.

Foot-candle describes illuminance, how much light lands on a surface. It is defined in imperial terms as the illuminance on a surface one square foot must have when it is illuminated by one lumen of luminous flux. In other words, one lumen spread evenly over one square foot produces an illumination of one foot-candle. This is the imperial counterpart to the SI lux, with the practical conversion that 1 foot-candle is about 10.764 lux.

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