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### The Solution of the “Light Clocks Paradox”

#### Abstract

In the 20th century, physics has understood space and time as being coupled into a “space-time”, a fundamental arena in which everything takes place. Space-time was considered to have three spatial dimensions and one temporal dimension. Out of the mathematical formalism for the fourth space-time component X4 = ict one can conclude that time t is only a numerical order of material change, i.e., the motion that we obtain with clocks. Time is not a 4th dimension of space. For the description of the Special Theory of Relativity it is here proposed an Euclidian 3D space whilst time t is merely a numerical order of a photon motion in a 3D space. This view solves the “light clock paradox”.