Bell in Vacuum - Economy, Acrylic jar of size 20x10cm. with Electric Buzzer, operated on 3-6V DC, Each

Details

The Bell in Vacuum Experiment is a classic physics demonstration that uses an audible buzzer in a vacuum to demonstrate how sound waves require a medium through which to travel. This experiment provides 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 this experiment, you will need a vacuum plate, vacuum pump, and 3-6V DC power source (not supplied). The bell jar measures 10"H x 5.7" in diameter.