Science
easyQ. No. 15078-what-is-the-approximate-lifetime-of-a-pi-meson-pion
What is the approximate lifetime of a pi-meson (pion)?
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A10⁻⁴ second
B10⁻⁶ second
C10⁻⁸ second
D10⁻¹⁰ second
Correct Answer: 10⁻⁸ secondYour Answer: C
Explanation
The lifetime of a charged pi-meson (pion) is approximately 2.6 × 10⁻⁸ seconds. This is an extremely short lifetime, typical of subatomic particles governed by the strong nuclear force. Option A (10⁻⁴ s): Too long - this is the lifetime of a muon, not a pion. This is not the pion lifetime. Option D (10⁻¹⁰ s): Too short - this is shorter than the actual pion lifetime.
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