Physics · Elementary Particles
What is the approximate lifetime of a charged pion (π-meson)?
- 12.6 × 10⁻⁸ seconds✓
- 210⁻¹⁰ seconds
- 310⁻²⁴ seconds
- 410⁻⁶ seconds
Correct answer
2.6 × 10⁻⁸ seconds
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