It takes very low speeds to see macroscopic magnetic effects from electric charges. I’m not sure that that ‘implies special relativity’, because it’s also consistent with the previous theory. But from a relativistic point of view, that’s a relativistic effect of much the same kind as time dilation/length contraction.
It takes very low speeds to see macroscopic magnetic effects from electric charges. I’m not sure that that ‘implies special relativity’, because it’s also consistent with the previous theory. But from a relativistic point of view, that’s a relativistic effect of much the same kind as time dilation/length contraction.