RUBENS TUBE: 1.75M x 75mm dia.
This apparatus is also known as the Standing Wave Flame Tube, or simply ‘Flame Tube’. Demonstrates a standing wave and shows the relationship between sound waves and sound pressure. Comprises a 1.7-metre long x 75mm dia. aluminium tube with a 5W speaker mounted in the hole at one end and the other end blocked except for a connection where gas can enter. Along the tubes length are [approx.] 200 holes. When gas is lit the flames dramatically show standing wave patterns created when the output of a signal generator is connected to the speaker. Instructions included.