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# ''The laws of physics are identical in all inertial reference frames.''

# ''The laws of physics are identical in all inertial reference frames.''

It is not difficult to demonstrate that it is impossible to reconcile these conditions with a Newtonian mechanisms, in which the coordinates are formed in a three-dimensional space. In SRT, each object moving in its own inertial frame has its own time, which constitutes a fourth coordinate describing its state.  

It is not difficult to demonstrate that it is impossible to reconcile these conditions with a Newtonian mechanics, in which the coordinates are formed in a three-dimensional space. In SRT, each object moving in its own inertial frame has its own time, which constitutes a fourth coordinate describing its state.  

The three most prominent SRT effects are time dilation, length contraction and the equivalence of mass and energy.

The three most prominent SRT effects are time dilation, length contraction and the equivalence of mass and energy.