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ESTUDIOS PIONEROSBenjamin Franklin (1752):Experimento d<strong>el</strong> rayo y <strong>la</strong> cometa origen <strong>el</strong>éctrico d<strong>el</strong> rayo.B. FranklinMicha<strong>el</strong> Faraday (1820):Descargas en arco (inestables).Al bajar <strong>la</strong> presión, <strong>la</strong>s <strong>de</strong>scargas se hacían establesy pasaban a emitir una luz tenue y difusa.M. Faraday10