In this video from The Physics Classroom's Concept Builder series, Mr. H explains how to determine the effect of bulb brightness and distance upon the rate at which lights upon an area of a surface (i.e., the illuminance).
Put your learning to practice with our Light Intensity Concept Builder:
https://www.physicsclassroom.com/Conc...
Try our CalcPad Problem Set LW4 for more practice with the Illuminance-Distance relationship:
https://www.physicsclassroom.com/calc...
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