<Tr> <Th> Doctoral students </Th> <Td> Vilhelm Bjerknes </Td> </Tr> <Tr> <Th_colspan="2"> Signature </Th> </Tr> <P> Heinrich Rudolf Hertz (German: (hɛɐʦ); 22 February 1857--1 January 1894) was a German physicist who first conclusively proved the existence of the electromagnetic waves theorized by James Clerk Maxwell's electromagnetic theory of light . The unit of frequency--cycle per second--was named the "hertz" in his honor . </P> <P> Heinrich Rudolf Hertz was born in 1857 in Hamburg, then a sovereign state of the German Confederation, into a prosperous and cultured Hanseatic family . His father Gustav Ferdinand Hertz (originally named David Gustav Hertz) (1827--1914) was a barrister and later a senator . His mother was Anna Elisabeth Pfefferkorn . </P>

Who was the first scientist who produce electromagnetic waves in a laboratory