What law states that the intensity of light at a given point is inversely proportional to the square of the distance from the light source?

The Inverse Square Law is a fundamental principle in physics that describes how the intensity of light (or any other physical quantity that spreads out from a point source) decreases with increasing distance from the source. Specifically, this law states that the intensity is inversely proportional to the square of the distance from the light source. This means that if you double the distance from the source, the intensity of light at that distance decreases to one-quarter of what it was at the original distance.

This relationship is crucial in understanding phenomena such as how light diminishes over distance, which is important in fields like astronomy, photography, and various engineering applications. Other laws, such as the Law of Reflection and the Law of Refraction, pertain to the behavior of light at surfaces and through different media, rather than how light intensity diminishes with distance. The Principle of Huygens deals with wave propagation and the behavior of light as a wave, but it doesn't specifically address the intensity over distance in the manner defined by the Inverse Square Law.