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Cloud S
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Cloud S

There are a lot of different ways to think about this depending on your understanding of physics. Put simply he didn’t just call it the 4th, it IS the 4th. Take any coordinate system in space and it’s fairly easy to convert time to space just by multiplying a constant (c-the speed of light). It’s difficult to conceive but because of relativity distance is dependent upon velocity… time dilation and length contraction means that distance and time are all relative to the observers. There is however a quantity that isn’t relative to the observer but rather constant for any two… Read more »

Patrick S
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Patrick S

In Newton’s view, time was a separate variable and appeared so in the equations. But when Einstein analyzed the behavior of light in the Michelson-Morely Experiment, he found that the only way to describe the results was to write: x^2 + y^2 + z^2 = c^2(t^2) This formula is a conservation or “invariant” equation which means that the left hand side is always equal to the right hand side. This means that if x changes, and y and z stay the same, then t must also change. This means that space (the x-variable) and time (the t-variable) are always linked,… Read more »