BELL IN BELL JAR

Without air or objects, sound waves cannot travel and thus cannot be heard. This principle is effectively demonstrated by the bell jar, which contains a battery-operated buzzer. When the buzzer is placed beneath the jar and a vacuum is produced within, learners will notice a complete lack of sound. Once the air has been reintroduced to the jar, the buzzer will sound again. The activity requires a vacuum pump and a plate, which are not supplied. Category No. Description 101766 Bell in Bell Jar H46