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Mark Rober's youtube channel: https://www.youtube.com/markrober

The previous videos in this series:
Chapter 1: Why Relativity is Hard https://www.youtube.com/watch?v=1rLWVZVWfdY&
Chapter 2: Spacetime Diagrams https://www.youtube.com/watch?v=hTxWAQGgeQw
Chapter 3: Lorentz Transformations https://www.youtube.com/watch?v=Rh0pYtQG5wI

This video is chapter 4 in my series on special relativity, and it covers how things that appear simultaneous from one perspective in our universe aren't simultaneous from other moving perspectives - that is, from inertial reference frames moving at different speeds. This is explained via the Lorentz transformation of coordinates of the events in question, enacted with a mechanical minkowski diagram, aka mechanical Lorentz transformation, aka spacetime globe.

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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!

Created by Henry Reich