The lifetime of a Π+ meson normally is 18 nanoseconds. In a large particle accelerator, scientists can create p+ mesons moving at speeds very close to the speed of light. What do the scientists observe when they measure the lifetime of a Π+ meson that is created at very high speed?
A. The Π+ meson lasts 18 nanoseconds.
B. The Π+ meson lasts much less than 18 nanoseconds.
C. The Π+ meson lasts much more than 18 nanoseconds.
D. The Π+ meson no longer decays, and remains as a stable particle.
Answer:C
The lifetime of a Π+ meson normally is 18 nanoseconds. In a large particle accelerator, scientists can create p+ mesons moving at speeds very close to the speed of light. What do the scientists observe when they measure the lifetime of a Π+ meson that is created at very high speed?
A. The Π+ meson lasts 18 nanoseconds. B. The Π+ meson lasts much less than 18 nanoseconds. C. The Π+ meson lasts much more than 18 nanoseconds. D. The Π+ meson no longer decays, and remains as a stable particle.