|Mechanics > Relative Motion||DCS# 1E20.10|
|foucault pendulum frame with
charron ring, pendulum, and electromagnet
||next to 101-13|
laser pointer with power supply adapter 101-02-C1
DC power supply 202-08-D
photogate with external gate and connector
The laser is aimed along a diameter of the scale so that the pendulum crosses the beam twice each cycle. The time the beam is blocked varies with the angle of the pendulum's plane of oscillation. The photogate raw voltage is read and a running average plotted against time for 48 hours, then the graph restarts.