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    Question

    According to the theory of relativity, which of the

    following al-ways remains constant?
    A Length of an object Correct Answer Incorrect Answer
    B Time Correct Answer Incorrect Answer
    C Space Correct Answer Incorrect Answer
    D Velocity of light Correct Answer Incorrect Answer

    Solution

    Thetheoryofrelativity,orsimply relativity,generallyencompassestwotheoriesof Albert Einstein: special relativity and general relativity.Conceptsintroducedbythetheoriesof 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 consideredtogetherandinrelationtoeachother. The speed of light is nonetheless invariant, the same for all observers.

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