One consequence of Einstein's ideas about the speed of light is that:
A) if two events take place at the same time, all observers will see that event simultaneously
B) whether events are seen as simultaneous or not depends on the motion of an observer
C) observers will always disagree on when an event took place
D) it is not possible to know when an event happened
E) moving observers can always know whether they are in motion

Question

Quizplus · Accepted Answer

Einstein's theory of special relativity states that the speed of light is constant and the same for all observers, regardless of their motion. This means that whether events are seen as simultaneous or not depends on the motion of an observer. Different observers moving relative to each other will measure different times and distances between the same events, which can lead to different perceptions of simultaneity.

One Consequence of Einstein's Ideas About the Speed of Light