Eisco Basic and Advanced Ripple Tank Kits - Eisco PH0769, This advanced ripple tank from EISCO is supplied complete with all the accessories needed for wave investigations. Each water wave acts similarly to a curved lens. The crest of the wave is seen as a bright region and the trough is seen as a dark region.Inside the ripple tank is a mechanical vibrator attached to a wave generator that produces either point wavelets or parallel wave fronts. Various obstructions and barriers can be inserted into the path of the wave, such as a single slit, a double slit or an edge.The tank is intensely illuminated by a strong light source, and synchronized with the wave generator to help students observe the wave patterns on a workgroup table. The frame is made of reinforced plastic and with foam beaches (to negate reflections). The tank includes a mirror, which can be mounted at 45°, to project the ripples onto a translucent screen on one side of the unit. Eisco PH0769 - Ripple Tank & Accessories