re:time dilation experimet
- From: "francisco" <paco1955@xxxxxxxxxxxxx>
- Date: Tue, 30 Aug 2005 08:57:18 GMT
suppose an observer in the experiment below placed one marker at the
location of the pion's formation and another at the location of its decay.
the distance between the markers is measured to be 17.4 m. on the other
hand, to an observer traveling along with the pion at 0.913c, the pion
appears to be at rest and measures its lifetime to be 26.0 ns, and the
distance between the markers showing the formation and decay of the pion is
[0.913c]*[26.0E(-9) s] = 7.1 m. thus two observers who are in relative
motion measure different values for the same interval.
"francisco" <paco1955@xxxxxxxxxxxxx> wrote in message
news:krrQe.413$Kk1.317@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
the pion is a particle that can be created in a high-energy particle
accelerator. it is a very unstable particle; pions created at rest are
observed to decay (to other particles) with an average lifetime of only 26.0
ns [26.0E(-9)]. in one particular experiment, pions were created in motion
at a speed of v = 0.913c (where c is the speed of light, 3.00E8 m/s). in
this case they were observed to travel in the laboratory an average distance
of D = 17.4 m before decaying, from which they decay in a time given by D/v
= 63.7 ns. this effect, called time dilation, suggest that something about
the relative motion between the pion and the laboratory has stretched the
measured time interval by a factor of about 2.5. this experiment reveals the
limitations of classical physics and serve as a test of einstein's special
theory of relativity
.
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