Foucault’s Pendulum The period of a pendulum is the time it takes the pendulum to make one...

Foucault’s Pendulum The period of a pendulum is the time it takes the pendulum to make one full swing back and forth. The period T, in seconds, is given by the formula , where l is the length, in feet, of the pendulum. In 1851, Jean-Bernard-Léon Foucault demonstrated the axial rotation accent of Earth using a large pendulum that he hung in the Panthéon in Paris. The period of Foucault’s pendulum was approximately 16.5 seconds. What was its length?