CONCEPTS – Assume that you are observing two pendulum clocks, a green one and a blue one. Pretend the clocks are identical in form~function. Realize that even though the relative phases of case a (inphase) and b (antiphase) are 180 degrees different (completely contrary), the clocks movement~mechanism is exactly the same in both clocks and in both cases, namely back~forth…back~forth… If you the observer...
