I have a question re the diagram that appears at:
The diagram purports to show that the observer in each frame of reference will observe that the clock in the other frame of reference is running slow (because he/she is comparing the reading of his/her clock with a reading of the other clock in the past).
However, the first observation diagrammed (i.e., the one by the "stationary" character on the left who states, at time T, "Your clock is running slow compared to mine.") appears to show the opposite, since more time has elapsed in the "moving" frame of reference (i.e, between 0 and T', which forms the hypotenuse of the right triangle) than has in the "stationary" frame of reference (i.e, between 0 and T, which forms a side of the same triangle). Thus, since MORE, not less, time has passed in the "moving" frame of reference, it would appear that time is running FASTER, not slower, in the same.
Am I missing something? If so, what?