Creating an electromagnetic wave with a length of 5 times its own wavelength is conceptually confusing, as a pulse typically consists of multiple wavelengths. The discussion clarifies that one can generate a pulse by activating a transmitter for the duration it takes to emit five wavelengths before turning it off. The energy produced by a wave does not change based on the number of wavelengths in a pulse; rather, it is determined by the wave's characteristics. The minimum pulse duration is influenced by the pulse's spectral content, which can be explored through concepts like Fourier-transform limited pulses. Understanding these principles is essential for manipulating electromagnetic waveforms effectively.