Foucault pendulum sharing the rotation of the earth about its own axis, the suspension point of the pendulum traces out a circular path during one sidereal day. At the latitude of Paris, 48 degrees 51 minutes north, a full precession cycle takes just under 32 hours, so after one sidereal day, when the Earth is back in the same orientation as one sidereal day before, the oscillation plane has turned by just over 270 degrees. If the plane of swing was north-south at the outset, it is east-west one sidereal day later. This also implies that there has been exchange of momentum;
The Passion of Michel Foucault The Passion of Michel Foucault The Passion of Michel Foucault is a biography of the French philosopher Michel Foucault authored by the American philosopher James Miller. It was first published in the United States by Simon & Schuster in 1993. Within the book, Miller made the claim that Foucault's experiences in the gay sadomasochism community during the time he taught at Berkeley directly influenced his political and philosophical works. Miller's ideas have been rebuked by certain Foucault scholars as being either simply misdirected, a sordid reading of his life and works, or as a politically motivated, intentional misreading. Writing for