In a two-dimensional world, where a three-dimensional object is viewed from above, everything is moving at the same speed in the height dimension, although this is unseen.
If the 3D object remains still in the 2D universe, it will not appear to move; however, if a height measuring device was used, it would be seen that the object is still moving at the speed of light.
If the 3D object is moved at a 45-degree angle, the shadow of the object will move, and the device measuring speed will move more slowly.
This demonstrates how time dilation and length contraction occur, and that the speed of light is not a rule, but rather a result of everything in the universe moving at the speed of light, and how this movement affects spacetime.
To encapsulate this concept, as everything in the universe including the particle is travelling at the speed of light, the only way to calculate the particle’s movement is to define the universe itself as the particle. In doing so, the rules of relativity can be dismissed as any movement at any speed would simply be a result of the observer.
