Is time dilation and length contraction hypothetical or is it really an observable fact.
for example,consider a rectangular sheet in a spacecraft moving at some high velocity.
Would an observer in the spacecraft be ever able to see the sheet as a square due to length contraction along its breadth(if the velocity is so so adjusted).
Would a stationary observer in the earth be able to observe the same.
In other words who experiences length contraction?
Also who experiences time dilation?
Asked Ajmal
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