Wednesday, August 10, 2011

Can a pendulum be used to show that the earth spins? How?

I don't know if the Smithonian Institute in Washington still has the Fouchet pendulum, but it was set up to show just that. The pendulum swang back and forth suspended from the ceiling. Enough open space was provided to clear a circular opening around the pendulum. As the day progressed, it would swing back and forth to locations on the circle progressing with the day, just like a clock.

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