Physics From Wikipedia, the free encyclopedia Jump to navigation Jump to search For other uses, see Physics (disambiguation) . Not to be confused with Physis . Various examples of physical phenomena Part of a series on Physics The fundamental science Index Outline Glossary History ( timeline ) show Branches show Research Physics portal Category v t e Physics is the natural science that studies matter , [a] its fundamental constituents , its motion and behavior through space and time , and the related entities of energy and force . [2] Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. [b] [3] [4] [5] A scientist who specializes in the field of physics is called a physicist . Physics is one of the oldest academic disciplines and, th...