*Originally posted by FabianFnas*

**Well, works and works... Matematicians doesn't use this property, as they do in the real numbers.
**

A question:

Fysicists tend to discard solution of equations that are complex. I know, of course that complex number are not unknown by them, but it seems that the complex number system is merely a tool of which real answer can be deducted.

Does anyone ...[text shortened]... complex numbers can be an answer? Like a complex distance, mass, time, or energy, or anything?q

THAT I know: Complex numbers are inherently involved with alternating current and RF, you have to use complex #'s to solve problems in current flow and voltages, say on an RF open wire feedline for instance, the current sine wave and the voltage sin waves are not in sync and require complex #'s to solve the real energy exchange, absorption or emission of RF from an antenna for instance. Without complex numbers, you would be left guessing, for instance, how much power is actually being transmitted. Fortunately all that math was done a century ago and now meters calibrated for that show the true powers, standing wave voltages, absorption, emission, reflection, return loss, etc., and we usually don't need to do complex math unless you are taking a ham license test or engineering test or designing new circuitry, but for the pro's, they just input parameters into Mathcad or other software pacs and don't have to do the math by hand any more.