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OpenStudy (anonymous):
Intensity, I, of light received at a source varies inversely as the squre of the distance, d, from the source. If the light intensity is 41 ft-candles at 18ft, find the intensity at 9ft. I=k/d^2
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OpenStudy (anonymous):
solve for k by plugging in your known values at 18ft, then plug 9 into the equation and get your I value
OpenStudy (anonymous):
I get I=164 at 9ft
OpenStudy (anonymous):
k=13284
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