Special Relativity statements

Proper Time 

interval between 2 events that occur at the same point in space

Time Dilation

clocks moving relative to an observer move more slowly than clocks at rest

 

 

Proper Length

 length or distance between 2 points measured at the same time by an observer at rest with respect to the points

Length Contraction

length of an object is measured to be shorter when it is moving relative to the observer than when it is at rest