Bell in Vacuum Experiment Apparatus

• Ingenious apparatus utilizes an audible buzzer in a vacuum to demonstrate how sound waves require a medium through which to travel
• Provide your students with a sensory experience by which they can observe the properties and dependencies of mechanical waves
• Designed by staff physicists and bench tested to ensure accurate and repeatable results
• Set includes (1) acrylic bell jar, rubber stopper fitted with lead plugs, and electric buzzer
• A vacuum plate, vacuum pump, and 3-6V DC power source are required but not supplied

The Bell in Vacuum Experiment is a classic physics demonstration that uses an audible buzzer in a vacuum to show how sound waves require a medium through which to travel. This experiment is a great way for students to learn about the properties and dependencies of mechanical waves. The set includes an acrylic bell jar, a rubber stopper fitted with lead plugs, and an electric buzzer. As air is removed from the closed system inside the bell jar, the sound of the buzzer becomes proportionately fainter. To conduct the experiment, a vacuum plate, vacuum pump, and 3-6V DC power source are required but not supplied. Size of bell jar: 10"H x 5.7" dia.