In relativity theory, the length of an object, say a rocket, appears to an observer to depend on the speed at which the object is traveling with respect to the observer. If the observer measures the rocket's length as L0 at rest, then at speed v the length will appear to be: = �1−2 0 2 This equation is the Lorentz contraction formula. Here, c is the speed of light in a vacuum, about 3 x 108 m/sec. What happens to as increases? Find lim . Why was the left-hand limit needed? →−