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(Solved): in an Earth reference frame, a star is 76 light years away. How fast would you have to travel so tha ...



in an Earth reference frame, a star is 76 light years away. How fast would you have to travel so that to you the distance would be only 31 light years? 


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In relativistic motion, Using length contraction equation: L = L0/ = Lorentz factor = 1/sqrt (1 - (v/c)^2) Given t
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