Why do we need to use electromagnetic waves for wireless telegraphy? For wireless telegraphy, we must utilize electric and magnetic fields generated by charges or currents produced at the transmission site, which then propagate to the distant receiving location. Static fields decrease with distance r as 1/r. This applies to both electric and magnetic dipoles. The transmitted power density is calculated according to Poynting as ~ = [Q:. -9]. It decreases with the use of static fields as 1/r with distance. The electromagnetic waves discovered by H. Hertz are, by their nature, light waves. They differ from the latter only by their longer wavelength. The transmitted power decreases, as we know from photometry, with 1/r. To demonstrate the superiority of Hertzian waves, we want to compare two stations.