Ruben's Tube

2015-03-18

We were learning about sinusoidal waves in our physics class in 11th grade and had this idea to demonstrate the concept with fire. The tube is filled with methane and sealed on one end. The other end is covered in a rubber membrane that reacts to a speaker playing music. As the membrane moves, the pressure waves travel down the tube in waves varying in volume and pitch. The wave becomes visible in the flames coming out holes drilled in the tube.