Sections
                          Key Equations
                      Key Equations
| speed of light | |
| constant value for the speed of light | 
| elapsed time | |
| relativistic factor | |
| length contraction | |
| relativistic momentum | |
| relativistic energy | |
| rest energy | 
| speed of light | |
| constant value for the speed of light | 
| elapsed time | |
| relativistic factor | |
| length contraction | |
| relativistic momentum | |
| relativistic energy | |
| rest energy |