Unified Cosmic Mechanics Evolution Theory (IX) Reconstruction of the Origin of Magnetism Based on Relativistic Dynamics

Based on the overall framework of the Unified Cosmic Mechanics Evolution Theory and combined with previous chapters, this paper verifies the universality of the special relativistic perception degradation effect. Focusing on electromagnetic force and electron motion, we re-examine the dynamic essence of electricity and magnetism within this framework: the work done in the direction of electric current originates from the momentum deviation of electron inertial motion, while magnetism is a special manifestation of electromagnetic force after the degradation of perception ability under the effect of special relativity, yet remains a form of momentum deviation. Due to the lack of an effective interaction environment in the direction of inertial motion, it is difficult to establish a transient resultant force, and thus difficult to generate electromagnetic force. In contrast, lateral attractive and repulsive forces originate from the retention of more interactable electromagnetic force components. This paper infers that the polarization of these attractive and repulsive forces stems from the polarization effect dominated by the "neat queue" formed by the continuous mutual influence of a large number of ordered electric currents. Other effects, such as chiral influence, remain to be studied.The core argument of this paper is: magnetism is essentially a degradation effect of electromagnetic force caused by the reduction in the number of perceptual windows when moving particles interact with the background momentum field under the effect of special relativity. Since all forces originate from the interaction of momentum units and corresponding interaction protocols, and each meson and proton contains both repulsive and attractive force protocols, the introduction of magnetic monopole theory is unnecessary. The charge sign corresponds to the intrinsic chirality of momentum units, the magnetic field direction originates from the macroscopic emergence of the electron spin 1/2 topological structure, and the Lorentz force can be strictly derived from discrete momentum unit interactions. Key findings:1. Magnetism is not an independent fundamental force, but a velocity-dependent manifestation of the electric field under the perceptual window effect;2. The sign of electric charge corresponds to a binary chirality parameter taking values plus or minus one;3. A tiny chirality-dependent difference on the order of the fine-structure constant squared is predicted in the wavelength of circularly polarized light;4. There exists a minimum characteristic time for the establishment of the electromagnetic field, identified as the Planck time.