 Quote by nitsuj
Maybe I need to ask it differently,
Why does c have to be squared (why are the terms squared in the first place)?
I'm pretty sure I've heard it has to do with the units (physical units I assume). Im just trying to piece that together.
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Nope, it's just the pythagorean theorem. The distance between any two events in a two-dimensional world is √(x
2 + y
2). In a three dimensional world with an "imaginary" time dimension being measured in seconds, it's √(x
2 + y
2 + z
2 - (ct)
2)