UIUC Physics Lecture Demo: Bell in Vacuum

UIUC Physics
Lecture Demonstration
Database

Demo # 362

Bell in Vacuum

ID # 362

Description:

A bell is rung in a container. At first, the class can hear the sound of the bell. Air is pumped out of the container and the sound of the bell begins to diminish. This shows the importance of having a medium through which sound waves can propagate.

Picture of Bell in Vacuum

Physics Concept:

Waves
Sound
Wave Analysis and Synthesis

The demonstration takes about 3 minutes to perform.