Multiple Choice
Solve.
-The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 ft from a light is 2 foot candles, find the intensity on a screen 20 ft from the light.
Express the answer as a fraction.
A) 
B) 
C) 2 foot-candles
D) 8 foot-candles
Correct Answer:
Verified
Correct Answer:
Verified
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