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4 August, 01:28

Particle physicists use particle track detectors to determine the lifetimeof short-lived particles. A muon has a mean lifetime of 2.2sand makes a track 9.5 cm long before decayinginto an electron and two neutrinos. What was the speed of the muon?

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  1. 4 August, 04:35
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    v = 4.32 10⁴ m / s

    Explanation:

    The speed of a particle is defined as the relationship between distance and time

    v = d / t

    In this case the particle goes at high speed, but the formula is the same, it has changes if you want to transform from a mobile reference system to a fixed one

    v = 9.5 10⁻² / 2.2 10⁻⁶

    v = 4.32 10⁴ m / s

    This speed is much lower than the speed of light, so the relativistic effects are small
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