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A pion is created in the higher reaches of the Earth's atmosphere when an incoming high-energy cosmic-ray particle collides with an atomic nucleus. A pion so formed descends toward Earth with a speed of 0.99c. In a reference frame in which they are at rest, pions have a lifetime of 26 ns. As measured in a frame fixed with respect to the Earth, how far will such a typical pion move through the atmosphere before it decays?

A pion is created in the higher reaches of the Earth's atmosphere when an incoming high-energy cosmic-ray particle collides with an atomic nucleus. A pion so formed descends toward Earth with a speed of 0.99c. In a reference frame in which they are at rest, pions have a lifetime of 26 ns. As measured in a frame fixed with respect to the Earth, how far will such a typical pion move through the atmosphere before it decays?

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
8 years ago
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