Electrophysical Forces of Natural Origin
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Scientific investigations since the late 1950s have shown that electromagnetic processes of natural origin, covering the full spectrum from static processes to the extremely high frequency range, exist in our immediate environment. These electromagnetic energies can be classified with regard to their frequency, and thus their position in the frequency spectrum, or described in terms of the wavelength they would possess if they were to propagate as waves in empty space. An overview of the relationship between wavelength and frequency, and the various frequency ranges included in the electromagnetic spectrum are illustrated in Fig. 2-1. It is customary to assign processes with frequencies below 1 Hz to the ultralow frequency (ULF) range. This is followed by the extremely low frequency (ELF) range (ending at 300 Hz), and the very low frequency (VLF) range (ending at 300 kHz).
KeywordsNatural Origin Natural Radioactivity Lightning Discharge Schumann Resonance Atmospheric Electric Field
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