2026 RSS P1 Q10

2026 RSS P1 Q10

Secondary 4
3 marks

The intensity of light, \(I\) lux, received from a light source is inversely proportional to the square of the distance, \(d\) metres, from the source.

The distance from the source is increased by 60% of its original value.

Calculate the percentage reduction in the intensity of light.[3]

Solution:

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Answer:\(60.9\%\)

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