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Height of puppets: 610mm
This multi-coloured parachute is made from durable
variety of designs for children to create
The 120mm diameter aluminium disc has a 20mm driving pulley
Harris Sound Wave Demonstration Set Age 4-5 Height of puppets: 610mmApparatus for investigating wave phenomena using sound. The efficient transducers may be driven by the output from a standard audio signal generator, and their sensitivity as receivers is such that they may be used directly on the 5mV input of an oscilloscope. Detailed equipment notes are provided covering investigations into: reflection and refraction; interference patterns in air; detection and measurement of phase differences in a signal received