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If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is _______ lux. A. 648 B. 24 C. 8 D. 216
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If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is _______ lux. A. 648 B. 24 C. 8 D. 216

User Thomas Anagrius
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2 votes
My friend told me it was C, 8 !
User Yasas Gunarathne
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3 votes
I took the test and the answer was C. 8
User Zigdon
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