The amount by which the volume of a material increases when the temperature is raised to one degree is called the coefficient of volumetric expansion.
The coefficient of volumetric expansion can be represented by the symbol (gamma).
Consider a material with the volume of at \(c\) and the material is heated upto \(c\). Now, the volume of the material is .
Let be the coefficient of cubical expansion.
We know that,
The change in volume \(ΔV\) is proportional to original volume , rise in temperature \(ΔT\), and material type.
Rearranging the above equation,