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// Ex1_5 Page:13 (2014)
clc; clear;
c = 3e+08; // Speed of light in vacuum, m/s
v = 0.9*c; // Speed of beam of particles, m/s
delta_t = 5e-06; // Mean lifetime of particles as measured in the Lab frame, s
delta_tau = delta_t*sqrt(1-(v/c)^2); // The proper lifetime of the particles from Time Dilation Relation, s
printf("\nThe proper lifetime of the particles = %4.2e s", delta_tau);
// Result
// The proper lifetime of the particles = 2.18e-06 s
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