Quick Answer: The Ball and Ring apparatus demonstrates thermal expansion: a hot ball will not pass through a cold ring, but it passes when both are hot or both are cold.
Last updated: October 2026
Key Features
Demonstrates thermal expansion
A hot ball will not pass through a cold ring
The ball passes through when both parts are hot or both are cold
About This Product
This apparatus demonstrates thermal expansion. When only the ball is heated, it no longer fits through the cold ring. Once ball and ring are both hot, or both cold, the ball passes through again. The Ball and Ring is available for supply within India and for export to Moldova, Liberia, Georgia, Italy and Burundi.
Frequently Asked Questions
Q1. When will the ball pass through the ring? The ball passes through when both the ball and the ring are hot, or when both are cold. It will not pass if the ball is hot and the ring is cold.
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