Main Question or Discussion Point
In moving frame,the time elapsed between the two ticks T1and T2 are measured by the two synchronized clocks kept at two different places x'1 and x'2.
The information that the rest clock has ticked first time reaches to the clock at x'1 at some time say t'1 and the information that the rest clock has ticked the second time reaches to the clock at x'2 at some time say t'2.
The information reaches in such a way that t'2 - t'1> t2 -t1.
If the information can travel with infinite speed , there will be no time - dilation.
But in this case , for different kinds of clocks e.g. sound and light clock, time dilation should be different.
So, this reasoning is wrong.
Should I simply take it for granted that time - dilation is property of space - time?
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