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  1. According to the theory of relativity, which of the following always remains constant ?

  2. A.

     Length of an object

    B.

     Time

    C.

     Space

    D.

     Velocity of light

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    Answer : Option D

    Explanation :

    The theory of relativity, or simply relativity, generally encompasses two theories of Albert Einstein: special relativity and general relativity. Concepts introduced by the theories of relativity include: Measurements of various quantities are relative to the velocities of observers. In particular, space and time can dilate. Space time: space and time should be considered together and in relation to each other. The speed of light is nonetheless invariant, the same for all observers.


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