This article provides a quick introduction to special relativity.

A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.

Read about the life and work of Albert Einstein, including details from his childhood and what he said about life just before he died.

A decent explanation of the concept of time as the fourth dimension. The author discusses Einstein's theory of special relativity and the idea of space-time.

A detailed discussion of the nature of light, how it can travel through a vacuum, and how the speed of light is affected when light travels through a medium.

Japanese theoretical physicist Sin-Itiro Tomonaga resolved key problems with the theory of quantum electrodynamics (QED) developed by Paul Dirac in the late 1920s through the use of a mathematical technique he referred to as...