St. Clare's Rule

St. Clare's Rule states that the time a signal takes to travel from a transmitting device to a receiving device is directly related to the distance between them. Specifically, because signals like electromagnetic waves (such as radio, microwave, or light) travel at a constant speed—close to the speed of light—the farther apart the two devices are, the longer it takes for the signal to reach its destination. This principle helps in estimating distances for communication and radar systems, ensuring accurate timing and positioning by understanding how signal travel time corresponds to spatial separation.