Figure 4. The vertical rail (black) and the vertical rod (green) are differently positioned to each one’s direction of motion (black vectors) in the observer’s frame ). Consequently, they differently react to Lorentz contraction along these directions: the rod changes its diagonal position (from green to the red one), while the rail’s perpendicular position remains unchanged. This leads to incompatibility between observations made in the rail and rod frames (adherence), and in the observer’s frame (deviation from the rail). Green vector points direction of the rod’s motion as observed in the rail frame

From

Collapse of Special Relativity in the Two-dimensional Space

Maciej Rybicki

International Journal of Physics. 2025, 13(2), 30-40 doi:10.12691/ijp-13-2-2