Andere Kunden interessierten sich auch für
![Resonator]( "Resonator")
Resonator25,99 €![Q factor]( "Q factor")
Q factor22,99 €![Resonances]( "Resonances")
Resonances77,99 €![Resonances in Few-Body Systems]( "Resonances in Few-Body Systems")
Resonances in Few-Body Systems74,99 €![Coupled-Resonator Slow-Wave Structures for Traveling-Wave Tubes]( "Coupled-Resonator Slow-Wave Structures for Traveling-Wave Tubes")
Coupled-Resonator Slow-Wave Structures for Traveling-Wave Tubes51,99 €![Heavy resonances in composite Higgs models]( "Heavy resonances in composite Higgs models")
Heavy resonances in composite Higgs models32,99 €![Resonances in Heavy Ion Reactions]( "Resonances in Heavy Ion Reactions")
Resonances in Heavy Ion Reactions77,99 €
High Quality Content by WIKIPEDIA articles! The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth surface and the ionosphere. This global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances occur because the space between the surface of the Earth and the conductive ionosphere acts as a closed waveguide. The limited dimensions of the Earth cause this waveguide to act as a resonant cavity for electromagnetic waves in the ELF band. The cavity is naturally excited by electric currents in lightning. Schumann resonances are the principal background in the electromagnetic spectrum between 3 69 Hz, and appear as distinct peaks at extremely low frequencies (ELF) around 7.83, 14.3,20.8, 27.3 and 33.8 Hz.