Time Dilatation in theory of Relativity

Description
Using a special light clock time dilatation is explained.Another example is that of a pole vaulter and a barn where a farmer observes the motion of a pole as the barn door opens and closes.The observations are explained using Lorentz Transformation.
Prof. Stanley Kowalski, Physics 8.01 2003 Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed Aug 5th,2011). License: Creative Commons BY-NC-SA: http://ocw.mit.edu/terms/#cc