Muons at speed 0.9918 c are sent round and round a circular storage ring of radius 350 m. If a muon at rest decays into other particles after an average of 2.2 × 10 −6 s, how many trips around the storage ring do we expect the 0.9918 c muons to make before they decay? a. 1.9 b. 4.7 c. 2.3 d. 3.0 e. 530

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.