Wave Motion equipment from the PHYWE Acoustics range. 4 products, 110V/60Hz adapted for U.S. labs.
Two equal gravity pendula with a particular characteristic frequency are coupled by a "soft" spiral spring.
The spring constant D is determined for different experimental set-ups from the oscillation period and the suspended mass.
As a compact teaching and laboratory device, the ripple tank provides a clear and quantitative approach to wave mechanics in secondary and higher education.
Earth's gravitational acceleration g is determined for different lengths of the pendulum by means of the oscillating period.