Maximal is circumstantial of course, but we can assume an estimate for it numerically for simple orbitals like hydrogen's first orbitalhow many wave fronts is an electron from maxima usually plug drugs? Well, just two wave fronts colliding with an orbital at a greater than right angle will cause an electron to shift to a higher orbital, or become repulsed by a lower orbital if in a descending direction, or

(By numerically I mean integer values, also assuming a shared trajectory of the external waves)

If a wave past maximal from one direction hit the electron while a wave past maximal from the other direction did so as well, we'd get positron annihilation and all sorts of particles that don't exist very long followed by a few we can barely detect.

So, 2 waves in 0.5ns/lightspeed is above maximal.