Skip to main content

Illustration Thermal expansion of a metallic rod

Thermal expansion of a metallic rod
Get illustration

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Sharing and adapting of the illustration is allowed with indication of the link to the illustration.

A metal rod of length \(l_0\) with initial temperature \(T_0\) is heated to final temperature \(T_1\). As a result of the heating, the rod expands to length \(l_1\). The change in length is:$$ \Delta l ~=~ l_1 - l_2 $$

The greater the coefficient of thermal expansion \(\alpha\) of the metal, the more the metal rod expands.