School of Physics Lecture Demonstration Manual

Hb-1 Expansion

Published: Monday 13 March 2006 - Updated: Monday 28 March 2011


To demonstrate and compare the thermal expansion of different metals.



Click on pictures to enlarge.

Expansion Diagram


The apparatus consists of a cast iron base with two vertical supports which hold the metal expansion rod. The pointer is zeroed by the adjusting screw illustrated and the burners lighted beneath the rod.

Expansion of the rod causes deflection of the pointer and this deflection may be compared for the different metals for the same time interval.

Safety notes

Fire/Burn safety


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