by requiring that the weak and slow limit of the Einstein field equations must recover. In the last videos we constructed a little bit of a conundrum for us we had the situation where i'm drifting through space and right at time equals zero one of my friend is one of my friends she passes me by in a spaceship going half the speed of light in the positive x direction relative to me and at time equal zero is exactly where she is at my position and then she keeps traveling and so i draw the path that she is taking so after one second she would be here after two seconds she would be there and we set up our scales so that the so that on our time axis one second is the same length as on our space axis or on our path axis three times ten to the 8th meters and we did that so that at least in my frame of reference the speed of light would be at a 45 degree angle or would have a slope of 1. namely that a spacetime interval shorter than the minimum size of. Zur Elektrodynamik bewegter Korper, reprinted in Das Relativitats- prinzip: eine Sammlung von Abhandlungen.
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