Relativity facts for kids

The word relativity usually means two things in physics:

• The principle of relativity, which was originally thought up by Galileo Galilei, and later used by Albert Einstein as one of the important postulates (like rules) of the theory of relativity.
• The theory of relativity itself, which has two parts: special relativity and general relativity.

See also

In Spanish: Relatividad (desambiguación) para niños