What Is the Difference in Time-Of-Flight (The Elapsed Time)required for Pions

question 42

Multiple Choice

What is the difference in time-of-flight (the elapsed time) required for pions (rest mass 139.5 MeV/c²) and kaons (rest mass 497 MeV/c²) each with momentum 150 MeV/c to travel 55 cm? Use 3.0 x 10⁸ for the speed of light.

• A)1.8 ns
• B)3.8 ns
• C)4.0 ns
• D)4.1 ns

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