The waves can be standard or stationary, because they don’t move along the orbit. The points where the orbital and the wave are joined is called a node; it is form by the electron. At these points, the wave`s amplitude is equal to 0.
At this image we see a node at each extreme, and between it can be more than one node. When we have lower vibration frequency, the wavelength is also lower, this result in more nodes.
If the behavior of the electron of the hydrogen atom is like a standard wave, the wavelength adjusts to the wave circumference.
Otherwise, it would cancel partially on each successive orbit and the wavelength was equal to 0 and would be canceled.