Echoes of History

A brilliant invention from 1905 by German physicist Heinrich Rubens, the Rubens' Tube is an incredible device that allows us to literally see sound waves using fire. This long metal pipe is filled with flammable gas and features a row of tiny punctures along the top. Once the gas is ignited, it creates a uniform line of flames. The moment sound is introduced into the tube, the internal pressure shifts in sync with the acoustic waves. This pressure change forces more gas out of certain holes than others, causing the flames to dance, rise, and fall. The stunning visual result perfectly maps out the shape of standing sound waves, beautifully turning invisible acoustics into something you can actually watch.

#rubenstube #physics #scienceexperiment #soundwaves #acousticart