The Inverse Square Law states that the intensity of a physical quantity, such as light or gravity, decreases with the square of the distance from the source. This means that if you double the distance from the source, the intensity becomes one-fourth as strong. For example, if you are standing twice as far from a light bulb, the light you receive is only 25% of what you would receive at the original distance. This principle applies to various phenomena, including the gravitational force between two masses, like the Earth and the Moon, and the brightness of stars as seen from Earth. Understanding the Inverse Square Law helps explain why distant objects appear dimmer and why gravitational effects weaken with distance.