The proper time between two events is measured by a clock at rest in a reference frame in which the two events:
Correct answer: B. Occur at the same co-ordinates
- A. Occurs at the same time
- B. Occur at the same co-ordinates
- C. Are separated by the distance a light signal can travel during the time interval
- D. Satisfy none of the above
Explanation
The proper time interval between two events is the amount of elapsed time reckoned on the clock of an observer in an inertial frame of reference who is physically present at both events. So if the observer needs to be present at both events, they must take place at the same coordinates.
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