일반물리학 2 · Relativity · Problem 59
일반물리학 2 — Relativity: Problem 59
59 An unstable high-energy particle enters a detector and leaves a track of length 0.856 mm before it decays. Its speed relative to the detector was 0.992c. What is its proper lifetime? That is, how long would the particle have lasted before decay had it been at rest with respect to the detector?
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