Frank has two balls that light up when they come in contact with a hard surface. He measures the power of the light from one of the balls at 24 m and find that it produces 120 W. If his second ball produces 115 W of power, at what distance would you expect the second ball to have the same brightness? Assume the light radiates uniformly in all directions.

Frank has two balls that light up when they come in contact with a hard surface. He measures the power of the light from one of the balls at 24 m and find that it produces 120 W. If his second ball produces 115 W of power, at what distance would you expect the second ball to have the same brightness? Assume the light radiates uniformly in all directions.

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