Bell Jar

Clear glass cylinder a foot high with domed cap and knob.

Details

9C25 - Vacuum

Demo use only

Instances

Instance #257

G2B20A - Demo West (Duane Physics)

Good - Normal Wear Demo use only

Used in these demonstrations

Glass bell jar on round vacuum platform with Energizer battery, buzzer with metal bell, and red wire clip, sitting on a wooden disc spacer; vacuum valve visible at base

Safety

Bell in Vacuum

Demonstrates that sound requires a medium for propagation. As air is evacuated from a bell jar containing a buzzer, the sound diminishes to near-silence, then returns when air is readmitted.

Reserve This Equipment

Demo use only

This equipment supports lecture demonstrations and cannot be reserved directly — it is assigned automatically as part of a demonstration. To use it, request a demo that includes it.