Bell Jar with Bell and Pressure Plate

Sound waves will not travel through a vacuum. Prove it with this demonstration of a ringing bell inside a sealed glass jar. As air is gradually vacuumed out of the jar, the bell will become faint, and will eventually become silent. Great demonstration model for the classroom setting.

Features:

• Bell jar with bell and pressure plate
• Demonstrates the inability of sound waves to travel through a vacuum
• Excellent classroom demonstration model
• Size: 8 inches diameter base, 8 inch tall glass dome
• Requires standard 1/4 inch tubing

Customer Reviews

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   Corwin Witt from Oak Ridge, TN
We boiled water, inflated a balloon, and could not heard the bell ringing under the vacuum with this bell jar.