Question

The average decay life time of an elementary particle is equation. Calculate the minimum uncertainty in the measurement of its energy. Also, calculate the minimum uncertainty in the measurement of its mass using the mass-energy equivalence.

19 Jan 2026
Answer :
Word Count : 145
The average decay lifetime of the particle is ( \tau = 1.0,\mu\text{s} = 1.0 \times 10^{-6},\text{s} ). According to the energy–time uncertainty principle, (\Delta E , \Delta t \ge \dfrac{\hbar}{2}), where ( \hbar = 1.055 \times ______ _________ _________ ______ ________ _____.
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