31. In 1851, physicist L�on Foucault demonstrated the rotation of the earth by constructing a Foucault pendulum beneath the central dome. 32. For example, L�on Foucault was able to show the Coriolis force that results from the Earth's rotation using the Foucault pendulum . 33. This effect can be understood as the electromagnetic counterpart of the mechanics of rotation, for example in analogy to a Foucault pendulum . 34. The original Foucault pendulum was exhibited as part of the collection, but was moved to the Panth�on in 1995 during museum renovation. 35. For example, a Foucault pendulum at 30?south latitude, viewed from above by an earthbound observer, rotates counterclockwise 360?in two days. 36. There is also a Paradise mosaic, a rendition of Raphael's fresco, and a Foucault pendulum , one of eight in Southern California. 37. A Foucault pendulum hangs in the central foyer, through all the floors, over a butterfly-shaped plate marked with the hours of the day. 38. A'pendulum day'is the time needed for the plane of a freely suspended Foucault pendulum to complete an apparent rotation about the local vertical. 39. A MEMS gyroscope takes the idea of the Foucault pendulum and uses a vibrating element, known as a MEMS ( microelectromechanical system ). 40. It was held on September 19, 2013 in the Main Building at the Gdansk University of Technology Foucault pendulum in the Johnan Hevelius courtyard.
