Mathematics
L=L0√(1-v^2/c^2)
An object's observed length depends on its speed relative to the observer. The observed length L is described by the above equation, where v is the speed of the object relative to the observer, c is the speed of light, and L0 is the observed length when the object is at rest relative to the observer. Which of the following correctly expresses the object's speed in terms of L, L0, and c?
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