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I am new to relativity, and through the books that I have chosen to learn the subject (that cater to my level) I seemed to be following with ease. However, I was posed with a simple question that I could not answer, and whatever it is, the thing that I am overlooking still eludes me.

Consider two observers moving relative to each other on an inertial frame of reference. Gravitational and other external effects aside, each observer considers himself to be at rest on his own rigid body and believes the other to be in motion. I have been told numerous times that each person witnesses the other experiencing a slower rate of time than their own.

Now, imagine two people at one point on the circumference of a large circle. Person A remains at rest while person B accelerates along the circumference until he is at the furthest point from A, and then decelerates on the way back to meet him. The Twins Paradox tells us that person B's clock would show an earlier time than A's when compared. This would mean that B would have (if he could) witnessed A's clock ticking at a faster rate than his own.

My question to you is, which example is correct? and (pre-emptively) if both are true, then what is the difference?

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# Extremely Basic Question Regarding Time Dilation

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