A passage from the German version of Einstein’s paper showing the Lorentz transformation boosting from one inertial frame to another moving relative to the first.

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1. Robert McNees (mcnees@mastodon.social)'s status on Tuesday, 26-Sep-2023 15:59:38 UTC Robert McNees

   in reply to

   As a result, we begin to disagree on things that we previously took for granted. For example, I may regard two events as simultaneous, while you insist that one happened before the other.

   Two observers moving relative to each other will generally give different descriptions of where and when things happen.

   To reconcile their descriptions we must accept that their notions of space and time get mixed up. Einstein explains the translation between reference frames: