Considering that speed of light is constant and finite, then why are the time dilatation and length contraction infinite to a frame of reference moving at the speed of light? We know that a moving frame of reference experiments time dilatation and length contraction from the point of view of a “static” observer. And, at the limit, if the frame of reference reached the speed of light, time would completely stop (what I called here “infinite dilatation”) and length would completely contract to zero (what I called here “infinite contraction”). I know that it’s not possible for a body to reach that speed (although I really don’t understand why), but let’s think about the practical applications of this. For example, I heard that currently they are successful at accelerating particles at 99,999% the speed of light at the Large Hadron Collider. So what does it means to have a particle that needs 1 second to move 299 792 458 meters? It looks like a normal speed to me, or at least as natural as any other. I agree and understand the concept of electromagnetic waves traveling at this particular number, and that this measurement does not depend of the speed of the observer. But why does this creates a physical limit to movement? Why can’t we reach and actually beat that speed with enough acceleration in a particle? And why a particle moving at this speed seems to cease to exist? When I say it ceases to exist I mean it has no dimension at all and it is not affected by time. What can an observer say that happens to a particle in the LHC at this speed?