<prompt> Pedzisa mutsara unotevera: Izvi zvakaita kuti agadzire bifilar uye soft iron oscillographs. Zviridzwa izvi zvakakunda mubayiro mukuru pa  <response>: Louis Exposition muna 1904. Iwo akanga ane simba zvikuru kupfuura stroboscope yekare, yakagadzirwa muna 1891 ipapo yaishandiswa. Zvakaramba zviri nzira yakanakisisa yokurekodha zviitiko zvemagetsi zvinomhanya zvikuru kwemakore anopfuura 40 apo zvakatsiviwa ne cathode ray oscilloscope. Dzakagadzirira nzira nzwisiso huru zvikuru yomufambiro wechinjo yazvino. 