Is a radio wave as big football field?

The size of a radio wave is determined by its wavelength. Radio waves encompass a wide range of wavelengths, starting from extremely low-frequency (ELF) waves with wavelengths as long as several kilometers, to extremely high-frequency (EHF) waves with wavelengths as short as a few millimeters. The size of a football field is approximately 90 meters long and 50 meters wide, which corresponds to a wavelength of about 300 meters. Therefore, some radio waves, such as ELF waves, can indeed have wavelengths comparable to the size of a football field.