If we were to measure the frequency of the wave from this frame by counting the number of crests that pass by per second, we would not get !00 . The reason is that the wave crests will be passing by at a higher rate due to our motion relative to the standing wave. Essentially we are traveling through the wave form as it is oscillating in place. The actual frequency of the wave in our new reference frame is still given by the Planck-Einstein equation. Thus, the relation between the frequency of the wave ω1, and the apparent frequency of its internal oscillationω' 0 , is