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Gravity’s
Rainbow launches five small balls into five rubber cups
with amazing accuracy. The exhibit employs a steel raceway,
whose angle can be adjusted up or down, to vary the
distance each ball travels. A catch mechanism holds
each ball in place alone the rail; when the catch is
released all the balls are launched off the end of the
rail. If the rubber cups are set in the proper position
they catch each ball which proves that the arc of each
ball is predictable. It is possible to move the launch
point of each of the five balls and the position of
each of the five cups. One can experiment with all elements
of the exhibit: the angle of the rail, the number of
balls, and the launch and landing points of the balls.
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