Question

According to the theory of relativity, length of an object depends upon

Answer 1

Heya!!

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According to the Special Theory of Relativity, lengthy of an object depends upon its velocity.

Length of an object changes if it's velocity is near of velocity of light in vacuum (299,792,458 m/s).

According to equation of length contraction, if velocity of an object is equal to velocity of light then it's new length = 0.. Means it will invisible.

Hope it helps u :)

Answer 2

according to the theory of relativity length of an object depends on observer with respect to object moves