So, event 1 happens at (X 1, Y 1, Z 1, T 1) and event 2 happens at (X 2, Y 2, Z 2, T 2). An “event” is something that happens at a particular place and time. This is basically just the Pythagorean theorem.īut when relativity came along it became important include time, T, along with the the three spacial coordinates, X, Y, and Z. The regular distance, D, between two things located at the points (X 1, Y 1, Z 1) and (X 2, Y 2, Z 2) is found using D 2 = (X 1-X 2) 2 + (Y 1-Y 2) 2 + (Z 1-Z 2) 2. That said, if you’re hip with pre-calc, then you’re ready for the basics of special relativity (like this post). Physicist: It’s worth noting real quick that this post is aimed at people who have recently taken intro relativity.
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