Lesson 1: Relativity  What is it?
Note: For Fermilab's Time Dilation Challenge and The Relativity Game, you need Shockwave. You may painlessly Download Shockwave here if you do not have it.Lesson 2: Time Dilation
Lesson 3 : Relativistic Mass
Lesson 4 : Length Contraction

Show Me The Derivation For our derivation, we will consider two measurements. One taken by a rider with the clock (referred to as the mover for the mover) and the other measurement for the clock will be made by a stationary observer (referred to as the stationary for the mover). Below is an animated giff that shows where the triangle (shown below this giff) comes from. It is a large giff, but steps through each leg of the triangle. If you understand the triangle, the pythagorean theorm gets us the incredible time dilation equation. To be sure the entire animated giff has loaded, the last frame should be the triangle shown below.
Show me these light clocks again. Then below show the construction for the derivation: From the above right triangle, the pythagorean theorem and a little algebra gives us the equation: Want to see it derived by someone else?
Lesson 2: Time Dilation
