In some approaches to teaching Special Relativity, spacetime diagrams are introduced much earlier, and are used in the derivation of the various features we’ve encountered. However, I find that spacetime diagrams can be quite confusing if you don’t already understand the essential features of Special Relativity. Moreover, when introduced later, as we’ve done here, I find that the student can more effectively integrate them into a graphic depiction of the subject’s essential features. Now that spacetime diagrams have made an appearance, any thoughts on this?
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