Any electronic circuit that processes information, we design with the assumption that the wavelengths of the signals in the circuit are larger that the physical feature size of the circuit elements, like the resistors, capacitors, inductors, transistors.
There is a misconception that resistance in electrical circuits is like a narrow passage in a water pipe. Resistance in series adds. Narrow passages in water pipes restrict flow given the minimum diameter, which is not additive (or if constant flow is provided, current is independent of pipe constrictions).
Open source code for Inverse Square Blind Source Separation without Prior
Paper describing Inverse Square Blind Signal Separation without Prior