Physics (from Ancient Greek: φυσική (ἐπιστήμη), romanized: physikḗ (epistḗmē), lit. “knowledge of nature”, from φύσις phýsis “nature”) is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force.
Branches of physics
- Classical physics: refers to theories of physics that predate modern, more complete, or more widely applicable theories.
- Modern physics: is an effort to understand the underlying processes of the interactions with matter utilizing the tools of science and engineering. In general, the term is used to refer to any branch of physics either developed in the early 20th century and onwards, or branches greatly influenced by early 20th century physics.