Question

define non-proper intervals of space and time​

Answer 1

Answer:

⭐And time interval between two events measured by clocks at two different points in space is improper time interval.

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⭐the theory of relativity, a quantity that characterizes the relation between the spatial distance and the time interval that separate two events. From the mathematical standpoint it is the “distance” between two events in four-dimensional space-time.

Answer 2

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in the theory of relativity, a quantity that characterizes the relation between the spatial distance and the time interval that separate two events. From the mathematical standpoint it is the “distance” between two events in four-dimensional space-time