cse • paper_2 • quantum_mechanicscse-2013-subject-05-001
Elementary particles — UPSC CSE 2013 Physics PYQ
Buy PYQ Solution Manual →In a series of experiments on the determination of the mass of a certain elementary particle, the results showed a variation of \pm 20\,m_e, where m_e is the electron mass. Estimate the lifetime of the particle.
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