An Unstable Particle Is Moving at a Speed of 2.6

Question 12
Short Answer

An unstable particle is moving at a speed of 2.6 × 108 m/s relative to a laboratory. Its lifetime is measured by a stationary observer in the laboratory to be 4.7 × 10-6 seconds.What is the lifetime of the particle,measured in the rest frame of the particle? (c = 3.00 × 108 m/s)