The intensity of light produced by a light source varies inversely as the square of the distance from the source. If the intensity of light produced 3 feet from a light source is 750 foot-candles, find the intensity of light produced 5 feet from the same source. [4 MARKS]

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kanadianugh93 · Accepted Answer

Concept: 1 MarkApplication: 3 Marks                    Intensivity of light in foot candles                    Distance from the source                            750                    3                            y                    5              750  ∞      1          3      2        750  =      K    9  K=750×9  y  ∞      1          5      2        y  =      K    25    y  =            750      ×      9        25  y=270 foot candles

The intensity of light produced by a light source varies inversely as the square of...

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