Inverse Square Law - GCSE Biology Definition

The Inverse Square Law is a scientific rule that helps us understand how certain things get weaker as we move away from them. In biology, this law often applies to things like light or sound. According to the Inverse Square Law, if you double the distance from a source of light, the brightness becomes four times weaker. This is because the light spreads out over a larger area. Imagine a torch shining on a wall: as you walk further from the wall, the circle of light gets bigger and dimmer. This concept is important in biology because it explains how light affects plants and animals at different distances.