The velocity (v) of an object in one system will have a different
velocity (v') if referred to another system in uniform motion relative
to the first. It had been supposed that only a "something" endowed
with infinite velocity would show the same velocity in all systems,
irrespective of the motions of the latter. Michelson and Morley's
results actually point to the velocity of light as showing the
properties of the imaginary "infinite velocity." The velocity of
light possesses universal significance; and this is the basis for
much of Einstein's earlier work.