organized into several distinct branches, which are outlined in this article. Classical mechanics is a model of the physics of forces acting upon bodies; includes...

the oldest. Over much of the past two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but...

outline is provided as an overview of and topical guide to physics: Physics – natural science that involves the study of matter and its motion through spacetime...

Physics is a branch of science whose primary objects of study are matter and energy. Discoveries of physics find applications throughout the natural sciences...

and physical science. Each of these branches, and all of their sub-branches, are referred to as natural sciences. Physics – natural and physical science...

into branches: physics, chemistry, astronomy and Earth science. These branches of natural science may be further divided into more specialized branches (also...

Modern physics is a branch of physics that developed in the early 20th century and onward or branches greatly influenced by early 20th century physics. Notable...

This glossary of physics is a list of definitions of terms and concepts relevant to physics, its sub-disciplines, and related fields, including mechanics...

Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and...

watts per square meter (W/m2) Intensity (physics), the name for irradiance used in other branches of physics (W/m2) Radiance, commonly called "intensity"...