Optical and Thermal Cameras

The inverse square law describes how the intensity of a physical quantity—such as light, sound, or radiation—decreases as it moves away from its source. In simple terms, as the distance from the source doubles, the intensity becomes one-quarter of its original strength. This principle is widely used in fields like physics, photography, acoustics, and engineering to explain how energy spreads out over space and why distance has such a strong impact on signal strength and visib