Problem 12.7In a laboratory experiment, a muon is observed to travel 800 m before disintegrating. A graduate student looks up the lifetime of a muon (2 × 10-6 s) and concludes that its speed was 800 m 2 x 10-6S Faster than light! Identify the student's error, and find the actual speed of this muon. V= = 4 x 108 m/s.

Problem 12.7In a laboratory experiment, a muon is observed to travel 800 m before disintegrating. A graduate student looks up the lifetime of a muon (2 × 10-6 s) and concludes that its speed was 800 m 2 x 10-6S Faster than light! Identify the student's error, and find the actual speed of this muon. V= = 4 x 108 m/s.