Movie: Rulers (0.7 c)
Watching rulers at rest and in motion.
Left: approaching at 70% of the speed of light,
middle: at rest, right: receding at 70%
of the speed of light.
All rulers have the same length when measured at rest,
a length measurement of the moving rulers gives
71% of the rest length.
MPEG4 320×240 (81 kB), MPEG4 640×480 (133 kB)