The amplitude of an electromagnetic (EM) wave does not affect its physical size or the volume of space it occupies. Instead, amplitude relates to the intensity or strength of the electric and magnetic fields, while the wave itself propagates at the speed of light regardless of amplitude. EM waves can be visualized as oscillating fields that fill a plane, influencing charges within that plane, but they do not extend infinitely in all directions. The interaction of EM waves with charges depends on proximity to the wave's path, not on the amplitude. Understanding these concepts clarifies that the physical characteristics of EM waves are distinct from their amplitude and intensity.