Inverse square law

The inverse square law states that the intensity of a physical quantity, such as light or sound, decreases proportionally to the square of the distance from its source. As you move farther away, the energy spreads out over a larger area, so the strength diminishes rapidly. For example, if you double the distance from a light source, the brightness becomes one-fourth. This principle explains many phenomena in physics, like why stars appear dimmer the farther they are and how sound diminishes with distance. It highlights how spreading out over space causes a reduction in intensity.