![]() If you allow a tennis ball to fall onto a hard surface like a table, you can be certain that it will. This is not only non-controversial, it's mathematically provable. In relativity, this is known as a simultaneous event: where all the space and time coordinates of two different physical objects overlap. In other words, in order for each person to arrive at their destination, there will need to be a moment where each of your two fingers occupy the same spot at the same time. ![]() There's no way for the person starting at A to get to B without passing by the other person, and there's no way the person starting at B can get to A without passing the first person. ![]() You can visualize where each one is by placing a finger from each hand at A and B, and then "walking" them towards their respective destinations. Imagine that you have one person who starts at A while the other starts at B, and they each travel towards the other point. someone to walk from point A to point B at the same time that someone walks from point B to point A, there will always be an event in spacetime where both of those travelers occupy the same point in all four dimensions: they will occupy the same spatial location at the exact same time. ![]() You can pick any two points and draw a 1-dimensional (linear) path connecting them. ![]()
0 Comments
Leave a Reply. |