Examples to aid your practice. Length Contraction The equation. Give me the pole and the barn analogy. There's an equation. Examples to aid your practice.
Muons are famous cousins of electrons.
In the 1950's scientists observed muons to have an average lifetime of 2.2 x 10 -6 seconds. Knowing this, scientists knew that if they went to the top of a mountain to count the number of muons present, the number should drop considerably if the same measurements were taken at the bottom of the mountain. However, because of relativistic effects, many more muons make it to sea level than predicted without relativity. This is one of much data that supports relativity. If you put all the problems you have an opportunity to work together with the muon, you can see how the different areas of relativity complement each other.