A particle with a lifetime of 2 X 10-6 s moves through the laboratory – McqOptions

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1.	A particle with a lifetime of 2 X 10^-6 s moves through the laboratory with a speed of 0.9 c. It s lifetime, as measured by an observer in the laboratory, is ___________
A.	2 X 10<sup>-6</sup> s
B.	3.2 X 10<sup>-6</sup> s
C.	4.6 X 10<sup>-6</sup> s
D.	5.4 X 10<sup>-6</sup> s
Answer» D. 5.4 X 10<sup>-6</sup> s

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