Simply by assuming the first postulate of Special Relativity and by exploring Gedankenexperiments with electromagnetic forces, we suggest that there is a speed limit in the universe, which can be determined as a relation between vacuum permeability and permittivity. We also derive space contraction and time dilatation without referring to light. Finally, we argue that, based on previous works on the derivation of Lorentz s Transformation without light and from our results, it is possible to transform the epistemological status of the Einstein s second postulate from principle into derivation.

中文翻译：

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来自涉及电磁力的经典 gedanken 实验的狭义相对论：对没有光的相对论的贡献

简单地通过假设狭义相对论的第一个假设，并通过探索电磁力的格丹肯实验，我们建议宇宙中存在速度极限，它可以确定为真空磁导率和介电常数之间的关系。我们还推导出空间收缩和时间膨胀而不涉及光。最后，我们认为，基于先前关于无光洛伦兹变换推导的工作和我们的结果，可以将爱因斯坦第二假设的认识论地位从原理转化为推导。