# Newbie question about time dilation

1. Jan 17, 2007

### salamander3x

Well, that is the whole point of the experiment! A 'clock' moving at speed v will run slower that a stationary clock by a factor of $\sqrt{1- \frac{v^2}{c^2}}$. I put 'clock' in quotes because any sort of regular motion or pulse that can be used to measure time (a pendulum, atomic disintegration, your pulse) will run slow as seen from from a "stationary" frame of reference. In that sense, time has slowed.