1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Particle question

  1. Oct 2, 2005 #1
    can someone help with this question?

    A certain particle has a lifetime of 1*10^(-7) sec when measured at rest. How far does it go before decaying if its speed is 0.99c when it is created?
  2. jcsd
  3. Oct 2, 2005 #2
    Well... I'd start this problem by putting it into the Lorentz formula and seeing the amount of time it would take for it to decay as observed by a stationary observer.

    I'd then multiply this time with the speed at which it is travelling.
  4. Oct 3, 2005 #3
    why'd you use the lorentz formula?
  5. Oct 3, 2005 #4
    He means the time dilation application of the Lorentz transformation. The particle still decays at the same rate in its own reference frame, but in an observer's frame in which it is travelling at 0.99c, this time interval is dilated: T' = T/root(1 - (v/c)^2).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Particle question
  1. Particle question (Replies: 0)

  2. Particle questions (Replies: 2)