An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 384 Hz tuning fork id held at the open end. Resonance is heard when a An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature and a 384 Hz tuning fork id held at the open end. Resonance is heard when a September 6, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related