Eisco® Bell in Vacuum Jar

Bell in vacuum jar is a classic experiment demonstrating properties of sound.

• Demonstrate the dependence of sound on the medium through which it travels
• Bell jar made of high-quality, break-resistant acrylic
• Electric bell operaties on 4 to 6V DC power source (not included)

This experiment demonstrates that sound needs a material medium for transmission, and it helps to reinforce the concept that sound is a mechanical wave that requires particles to carry its energy. Slowly decrease the air inside with a vacuum pump (available separately) and hear the sound disappear. Electric bell operates on 4 to 6V DC power supply. Size of bell: 25 cm tall×14 cm diameter.

Ordering information: Requires a vacuum pump and DC power supply (not included).

Delivery information: Includes 1 bell jar, 1 electric bell, 1 rubber cork with terminals.