Clocks in Different Relativistic Inertial Frames

β

0

perspective

Zak's

Jill's

Jill is at rest, and Zak is on a train moving with velocity

v

such that

β=v/c

. Jill and Zak each have a set of clocks, and in their respective rest frames the clocks all appear to be set at

t=0

, spaced 1 m apart. At the point in spacetime shown, the middle clocks are aligned at the same location and time

t=0

. You can see how Jill perceives her clocks compared to Zak's clock and vice versa.