Number 94 (Story #1), September 16, 1992 by Phillip F. Schewe and Ben Stein|
GALILEO'S EXPERIMENT AT THE LEANING TOWER OF PISA has been vindicated anew. Italian scientists at the University of Pisa (appropriately enough) have verified the universality of the free fall acceleration, g, at the Earth's surface to an accuracy of a few parts in 10**-10. (S. Carusotto et al., 21 Sept. 1992 issue of Physical Review Letters). They did so by measuring the angular acceleration of a falling disk in vacuum. The falling disk, with mirrors at its rim, acted as a sort of Michelson interferometer.