This concise tutorial from the Physics Classroom explores a phenomenon that is integral to Einstein's Theory of Special Relativity. This phenomenon is known as "Relativistic Length Contraction" and occurs when "the...

This website, created by Andrew Hamilton of the University of Colorado-Boulder, gives multiple gif animations related to black holes ranging from falling into a black hole to Hawking radiation. These animations are...

Authored and curated by David P. Stern, this is a lesson plan for teaching frames of reference. It is linked to text material on reference frames, aberration of light, and a very short introduction to the foundations of...

Gravity Probe B is the relativity gyroscope experiment being developed by NASA and Stanford University to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity. The experiment...

Hyperphysics is "a broad-ranging interactive physics exploration environment which is written in HTML with Javascript calculation routines." It was developed by Professor Rod Nave of Georgia State University and is...