The mean lifetime of muons is 2.2 μs. How fast are they moving if their measured mean lifetime is 1.1 μs?
A) 0.50 c
B) 0.87 c
C) 0.56 c
D) 0.94 c
E) This cannot happen.

Name: The mean lifetime of muons is 2.2 μs. How fast are they moving if their measured mean lifetime is 1.1 μs? A) 0.50 c B) 0.87 c C) 0.56 c D) 0.94 c E) This cannot happen.
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Question

Quizplus · Accepted Answer

The measured mean lifetime cannot be less than the proper mean lifetime due to time dilation effects in special relativity.

The Mean Lifetime of Muons Is 2