Ripple Tank Kit. An overhead projector type ripple tank for demonstration of various wave phenomena, including reflection, refraction, diffraction, and interference. The unit comprises shallow 40 40 cm tank with scratch-resistant acrylic window on the bottom, supported by four adjustable legs. Two arms on the side hold an eccentric motor and bar assembly, onto which either two point dippers, or plane-wave dipper can be attached. The motor and bar assembly is suspended by springs so the vibration is not transmitted to the tank. bright point light source is held overhead, which shines down through the water in the tank, and casts shadow of the waves on the bench below. The following accessories are included: Concave, convex, rectangular Perspex plates; curved reflector; two large one small barriers; two point dippers; hand stroboscope; banana leads; instructions. The motor requires continuously variable 0-5 DC power supply, and the lamp requires 12 AC supply. Alternatively, the ripple tank can be driven by the SO180324 ripple tank LED driver.