Georg Ohm's now-basic electrical law was dismissed as nonsense for years

In 1827, Georg Ohm published the precise relationship between voltage, current and resistance — V = IR — after years of careful experiments with wires of different lengths. German physicists mocked the work as too simple to be real science, and Ohm lost his teaching post soon after. Only in 1841 did the Royal Society recognize him with the Copley Medal, and the unit of electrical resistance now carries his name.

— Georg Simon Ohm, Die galvanische Kette, mathematisch bearbeitet — Berlin, 1827