One consequence of Einstein's ideas about the speed of light is that
A) if two events take place at the same time for one observer, they will occur simultaneously for all observers.
B) whether events are seen as simultaneous or not depends on the motions of observers.
C) two events cannot happen at the same time for two different observers.
D) it is not possible to know when an event happens.
E) people could design and fly interstellar spaceships moving as fast as light itself.

Question

Quizplus · Accepted Answer

Einstein's theory of relativity suggests that simultaneity is relative and depends on the observer's frame of reference, meaning that two events may be simultaneous for one observer but not for another, depending on their relative motion.

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