French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyro more..French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope (1819-1868)(noun.person)
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French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope (1819-1868)(noun.person)