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- TL;DR Summary
- Is there a simple mathematical demonstration which derives length contraction and time dilation from light speed being constant across multiple reference frames.

A long time ago, I was very impressed by a lecture on elementary special relativity which showed in simple math how the correct conclusion to the null results of the Michelson-Morley experiment were obtained by concluding a constant c but then adding a length contraction and time dilation. I don’t remember the math demo except that it was simple and used Pythagorean theorem. I think the triangle sides were different lengths that light traveled based on the reference frames. Can anyone reproduce such a demo? By Searching for Lorentz transformations, I haven’t found it on the web.