Kundt's tube
= Kundt's tube
{wiki=Kundt's_tube}
Kundt's tube is an experimental apparatus used to demonstrate the properties of sound waves, specifically standing waves. It is named after the German physicist August Kundt, who created the device in the 19th century. The apparatus typically consists of a long, transparent tube filled with a fine powder (such as a mixture of cornstarch and sugar) or some other medium that can easily be disturbed by sound waves.