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Unformatted text preview: 67. (a) Our lab-based measurement of its lifetime is ﬁgured simply from t = L/v = 7.99 × 10−13 s. Use of
the time-dilation relation (Eq. 38-7) leads to
∆t0 = 7.99 × 10−13 s 1 − (0.960)2 = 2.24 × 10−13 s . (b) The length contraction formula can be used, or we can use the simple speed-distance relation (from
the point of view of the particle, who watches the lab and all its meter sticks rushing past him at
0.960c until he expires): L = v ∆t0 = 6.44 × 10−5 m. ...
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- Fall '08