The Best Explain Intuitively Why Speed Of Light Cannot Be Added Ideas. It's sort of like saying the product of two numbers is equal to the sum of the same two numbers just because 2+2=2x2. It is common knowledge that the speed of light is the fastest that anyone can go, but why does this cap on causality exist?

This means, at the speed of light spatially, time stops. Web at the speed of light, all of his motion through spacetime is along the spatial direction and he will have no component along the vertical time axis. More generally, the classical rule for the composition of velocities fails:





