A pair of observers moving relative to each other will
A) always agree on the ordering in time of two events
B) sometimes disagree about whether two events are simultaneous
C) always disagree about the ordering in time of two events
D) always agree about whether two events are simultaneous

Question

Quizplus · Accepted Answer

According to the theory of relativity, the perception of time and space is relative to the observer's frame of reference. Therefore, two events that appear simultaneous to one observer might not appear simultaneous to another observer who is moving relative to the first observer. However, the ordering in time of two events will always be the same for both observers, even if they perceive the events occurring at different times. So, option B is the correct answer.

A Pair of Observers Moving Relative to Each Other Will