  The determination of whether two distant events are simultaneous depends on
the velocity of the observer. This velocity dependence is typically explained
in terms of the relativity of space and time in a counterintuitive manner by
the Special Theory of Relativity. In this paper, I describe a straightforward
and intuitive way to explain the velocity dependence of simultaneity in terms
of velocity-dependent changes in the spatial (k, {\lambda}) and temporal
({\omega}, {\nu}) characteristics of electromagnetic waves that result from the
Doppler effect. Since, for any solution to a wave equation, the angular wave
vector (k) and distance vector (r) as well as the angular frequency ({\omega})
and time (t) are complementary pairs (k *r) and ({\omega}t), it is only a
matter of taste which members of the pairs (k, {\omega}) or (r, t) one assumes
to depend on the relative velocity of the source and observer. Einstein chose r
and t and I chose k and {\omega}. I present this electromagnetic wave approach
to understanding the velocity dependence of simultaneity as a physically
realistic alternative to Einstein's Special Theory of Relativity.
