"Activités de comprehensive"

This bell jar demonstrates that sound waves can't travel and therefore can't be heard without air or matter.

This ripple tank is transparent, acrylic plastic and supported in a sturdy plastic frame.

These long-lasting aluminum tuning forks have a full sound.

A mess proof way to demonstrate waves and refraction in water.

Alloy tuning fork economy stamped.

A must for explorations of sound and waves.

Closely wound steel helix for studying wave behavior.

Experiment With Sound Wave Interference

The Large Wave form helix easily demonstrates wave phenomena.

A Classic Demonstration!