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.
C) 2 foot-candles
D) 8 foot-candles

Question

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.
C) 2 foot-candles 
D) 8 foot-candles

Quizplus · Accepted Answer

The Answer of 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.
C) 2 foot-candles 
D) 8 foot-candles

Solve. -The Intensity I of Light Varies Inversely as the Square