Question

define interval in special theory of relativity ​

Answer 1

In relativity, proper time along a timelike world line is defined as the time as measured by a clock following that line. ... This interval is the quantity of interest, since proper time itself is fixed only up to an arbitrary additive constant, namely the setting of the clock at some event along the world line.

Answer 2

Explanation:

In relativity, proper time along a timelike world line is defined as the time as measured by a clock following that line. ... This interval is the quantity of interest, since proper time itself is fixed only up to an arbitrary additive constant, namely the setting of the clock at some event along the world line.