Double Convex Glass Lens, 75mm Diameter, 200mm Focal Material_Rubber Simulates kinetic gas theory through

Simulates kinetic gas theory through an electric motor vibrating a transparent tube of small steel balls

Electromagnet-driven at approximately 80Hz with a captive thumbscrew on one prong for Melde's experiment

micrometer

and storage between uses at the laboratory bench

5 inches of nylon bristles for scrubbing glassware up to 4 inches in diameter

Double Convex Glass Lens, 75mm Diameter, 200mm Focal Material_Rubber Simulates kinetic gas theory throughOptically worked, spherically ground, and edge polished, this double convex converging lens gathers parallel light to a single focal point for bright image formation demonstrations.