In science, reaction is closely realted to Newton's third law: "For every action there is an equal and opposite reaction". The idea that any given force has a pair or opposite force.
This law has often been applied to social sciences, and is a basic premise of the popular Game theory.
A reaction is any responsed caused by some other action. There are many different types of reactions:
- Chemical reaction
- Reflex reaction
- light reaction
- Hill reaction