Consider a Home Frame and an Other Frame that moves in the $+x$ direction with respect to the Home Frame.
-(a) Observers in the Home Frame will conclude that the clocks in an Other Frame will be out of synchronization, even if the observers in the Other Frame have carefully synchronized clocks using the Einstein prescription.

Question

Quizplus · Accepted Answer

Due to the relativity of simultaneity in special relativity, observers in the Home Frame will perceive the clocks in the moving Other Frame as being out of sync, even if those clocks were synchronized in their own frame according to Einstein's synchronization procedure. This effect arises because the concept of simultaneity is relative to the observer's frame of reference.

Consider a Home Frame and an Other Frame That Moves +x+x+x

Consider a Home Frame and an Other Frame That Moves $+x$