Ripple Tank Premium 
suitable for KS4+. This excellent quality Ripple Tank provides a comprehensive demonstration of the general properties of waves. Wave Propagation Phenomena are projected onto a screen. Topics to explore: Reflection & Refraction - parallel waves can be produced and by using appropriate barriers reflection and refraction are produced. Interference Phenomena - occurs when two point source dippers generate circular waves. These can be regulated. Plus many more experiments. Teacher's notes and experiments are provided in a superb manual. Kit consists of: Variable Vibrator, Ripple Tank, Wave dampers, Electronic Stroboscope with halogen lamp, projection mirror, screen (size 32 x 30cm), wave dippers, and accessories. 12V, 5A DC Power supply included. The Ripple Tank and accessories are all housed in a high quality, aluminium case.