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: Length Contraction
Lesson 4: Relativistic Mass

Give me the Proton Analyogy? Accelerate a proton from 50% c to 60% c  something's missing: (I know, acceleration doesn't belong with special relativity, but it makes for a good analogy) At rest, the proton's mass is roughly 1.67 x 10^{27} kg. As it travels by us at 50% c, lets say we give it an electrical push of 5.01 x 10^{14} Newtons for 1 x 10^{6} seconds. Considering Newton's 2nd Law and its rest mass, we would expect the proton to accelerate the proton to 60% c (show me why). If we can predict its speed, we can predict that in the 1.0 second after the push the proton should cover about 180,000,000 meters (show me why). However, what we observe is different. We observe the proton accelerate to about 59% c. From 80% c to 90% c  something's missing: This whole difference becomes more dramatic if we consider trying to accelerate the proton from 0.8 c to 0.9 c. Again we give the proton we expect to have a mass o roughly 1.67 x 10^{27} kg an electrical push of 5.01 x 10^{14} Newtons for 1 x 10^{6} seconds. Considering Newton's 2nd Law , we would expect the proton to accelerate the proton to 90% c (show me why). After the Push: Let's consider the relativistic mass equation: Although we expect the proton to accelerate to 90% c, we observe it to accelerate as though its mass is 3. 2 x 10^{27} kg.
Now we have the speed of the proton after it accelerates and it is less than we expect. We can explore how this affects our measurement of length.
Lesson 4: Relativistic Mass
