>"Some of the most interesting impedance matching occurs when energy comes in the form of a wave. You have probably noticed in a swimming pool that waves from a splash reflect off the sides of the wall. Because there is an impedance mismatch between the water and the wall, the wave energy is unable to couple into the wall, and so it reflects back."

Observation:

If:

Impedance Mismatch = Reflection Of Waves = No Fixed Wave Nodes (Wave Nodes Must Travel in Space and Time) = Dispersion Of Energy in Time, over Space

Then:

Impedance Matching = Creation Of Standing Waves (creation of fixed, non-moving wave node points in space) = Preservation Of Energy In Space, over Time = Capacitance

(Note that I'm not saying I'm right... I'm just saying that if A implies B (A->B), and B implies C (B->C), then there's a very strong possibility that A implies C through logical transitivity / chain of implications (i.e., A->B->C becomes A->C), in the above case that Impedance Matching strongly implies Capacitance (via Standing Waves)...

Also, it should be noted that Capacitance comes in many forms... Electric (electrostatic), Magnetic, and in theory, any type of electromagnetic wave should be subject to Capacitance under the right conditions...)

Anyway, great article!