Na Cambridge, England, na 1863, James Clerck Maxwell, prọfesọ nke physics nnwale, gosipụtara n'ụzọ doro anya ịdị adị nke ebili mmiri electromagnetic, na-enweghị nkwenye bara uru. N'ịbụ onye mkpughe nke ọkà mmụta sayensị Bekee, Henrich Rudolph Hertz (1857-1894), German, nke a mụrụ na Hamburg, tinyere ọtụtụ afọ nke ọmụmụ ihe na isiokwu ahụ masịrị ya.
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