Ball and Ring apparatus, Brass; Ball 19mm, Wooden Handle

The Ball and Ring apparatus is a physics demonstration device used to study thermal expansion. It consists of a brass ring fixed on a stand and a brass ball with a diameter of 19mm that fits through the ring when both are at room temperature. The ring is often mounted on a stand with a wooden handle for ease of handling and heating. When heated, the brass ring expands due to thermal expansion, becoming slightly larger and preventing the ball from passing through until both return to the original temperature. This apparatus illustrates the principle that materials expand when heated.