# Tyndall's bar breaker

> Physics experiment demonstrating thermal expansion

**Wikidata**: [Q570869](https://www.wikidata.org/wiki/Q570869)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Tyndall's_bar_breaker)  
**Source**: https://4ort.xyz/entity/tyndall-s-bar-breaker