A Meson Moving Through a Laboratory of Length X at a Speed

question 5

Multiple Choice

A meson moving through a laboratory of length x at a speed v decays after a lifetime T as measured by an observer at rest in the laboratory. If the meson were at rest in the laboratory its lifetime would be:

• A) T(1 - v/c)
• B) T(1 - v/c)^-1
• C) T(1 - v²/c²)^-1/2
• D) T(1 - v²/c²)^1/2
• E) (T - vx/c²)(1 - v²/c²)^-1/2

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