The strength of an electric field decreases with distance from its source due to the dispersion of field lines, while the amplitude and frequency of light remain constant as photons spread out. Although individual photons do not lose energy, their density decreases with distance, leading to fewer interactions with measurement devices. The concept of flux or intensity helps quantify this spreading and relative strength at different distances. This distinction highlights the differences in behavior between electric fields and electromagnetic waves. Understanding these principles is crucial for applications in physics and engineering.
