Video encyclopedia

Special relativity


Special relativity explained in under three minutes


Visualization of Einstein's special relativity


Do you really understand Einstein’s theory of relativity? - BBC News


What is the difference between Special Relativity and General Relativity?


Relativity of Simultaneity | Special Relativity Ch. 4

In physics, special relativity is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time. In Albert Einstein's original pedagogical treatment, it is based on two postulates:The laws of physics are invariant in all inertial systems. The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source.
  • Origins and significance 

  • Traditional "two postulates" approach to special relativity 

  • Principle of relativity 

  • Lorentz invariance as the essential core of special relativity 

  • Consequences derived from the Lorentz transformation 

  • Optical effects 

  • Dynamics 

  • Relativity and unifying electromagnetism 

  • Theories of relativity and quantum mechanics 

  • Status 

  • Technical discussion of spacetime