Which best describes the proper time interval between two events?
A) the longest interval measured by any inertial observer
B) the interval measured in the reference frame in which the two events occur a maximum distance from each other
C) the interval measured in a reference frame in which the two events are simultaneous
D) the interval measured in a reference frame in which the two events occur at the same place
E) None of these choices are correct

Question

Quizplus · Accepted Answer

The proper time interval between two events is defined as the time interval measured in the reference frame where the two events occur at the same place. This is the frame of reference where the events happen at the same location, and the clocks are in the same position, making it the most precise measurement of time between the two events.

Which Best Describes the Proper Time Interval Between Two Events