WayAhead
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Dette er området kobber har beskyttende effekt i forhold til "støy:"
EMP’s frequency range, depends on the source. A nuclear weapon detonated at high-altitude produces relatively long duation EMP, thus contains low frequency components (100 MHz). Because conventional EMP devices produce explosions driven by HPMW technology, they may have a frequency in the range of 100 MHz – 100 GHz. EMP, depending on altitude and power, can generate electric field up to levels of 50 kV / m.