electron → CapableOf → move at the speed of light | 0.64 | |
jet → CapableOf → move at the speed of light | 0.50 | |
pulse → CapableOf → move at the speed of light | 0.41 | |
observer → CapableOf → move at the speed of light | 0.37 | |
cosmic ray → CapableOf → move at the speed of light | 0.36 |