. For him, therefore, the length of the rod lying on the embankment is no longer
, as for the embankment observer, but
. The graph shows us that this length
is shorter than the length
of the rod the observer is carrying with him. And as these two rods, when placed side by side at rest, are equal we see that as measured by the observer the rod, on the embankment past which he is moving, will have suffered a contraction.