English version

Foucault, Jean Bernard Léon

From Longman Dictionary of Contemporary EnglishFoucault, Jean Bernard LéonJean Bernard Léon FoucaultFou‧cault, Jean Ber‧nard Lé‧on /ˈfuːkəʊ $ fuːˈkəʊ, ʒɒn ˈbeənɑː ˈleɪɒnǁʒɑːn berˈnɑːr leɪˈɑːn/  (1819–68) a French scientist who studied the speed of light. He is known for inventing Foucault’s Pendulum, an object that swings on a wire and shows how the Earth spins around. He also invented the gyroscope.
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