In the hypothesis of the ground state particle sea, the universe is filled with a homogeneous and isotropic ground state particle sea, and the speed of light is determined by the density and elastic modulus of the particle sea. Based on this hypothesis, this paper derives the length contraction of moving objects starting from the potential field contraction of moving point sources in the particle sea; deduces time dilation using the light clock model combined with length contraction; and gives the mass increase formula through the energy transformation of the field, finally obtaining the Lorentz factor . This derivation does not rely on Einstein's principle of relativity or the assumption of the constancy of the speed of light (the speed of light here is an inherent property of the particle sea), but reduces relativistic effects to the dynamic response of matter in the ground state particle sea. This paper aims to provide a quantitative basis consistent with special relativity experiments for the hypothesis of the ground state particle sea, and offer a new perspective for understanding the medium origin of space-time.
Wei Yang (Mon,) studied this question.