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Einstein protocol is a standard used for precisely measuring the distance between two objects in space. The Einstein protocol of finding the distance between two points is sending light from point a to point b and then immediately sending a signal, using light, from point b to point a. The calculations done with this data uses the formula .
Because there are many factors in measuring the distance of space a protocol was set up to determine order of importance when measuring a distance, using light, from a to b and back.