"There is an art to science, and a science in the art; the two are not enemies, but different aspects of the whole." - Isaac Asimov
Film, Digital Photograph
22" x 32.5"
The change in length measurements of an object ("linear dimension" as opposed to, e.g., volumetric dimension) due to thermal expansion is related to temperature change by a "linear expansion coefficient". It is the fractional change in length per degree of temperature change.