Interconnects, some have directional indicators, why?

Also here:
https://books.google.com/books?id=t7EB4PJMPVsC&pg=PT20&lpg=PT20&dq=electromagnetic+wave+...

atmasphere

geoffkait:My post relates to the proposition that the electromagnetic wave that is the audio signal **in** copper wire or any conductor is comprised of photons, as are all electromagnetic waves.

"For a given value of ’in’ I suppose increases or decreases the number of words in your mouth, apparently.

Emphasis added."

whatev

@jea48 

“There it was, right in front of me in black and white! The current does not flow around a loop setting up a magnetic field as I had, along with countless other engineers, been taught in high school and university. It is the other way round. The electric current is but an artifact of a more fundamental entity.”

You can work that either way you want to- put the em field somehow in place and the current will flow in the wire, or put the current through the wire and the em field will be generated. Either way its a red herring and has nothing to do with directionality nor suggests a means for directionality.

Either way its a red herring and has nothing to do with directionality nor suggests a means for directionality.

I never said it did. I said AC current does not flow in a circuit. AC does not flow back and forth in a circuit.

“The usually accepted view that the conductor current produces the magnetic field surrounding it must be displaced by the more appropriate one that the electromagnetic field surrounding the conductor produces, through a small drain on the energy supply, the current in the conductor. Although the value of the latter may be used in computing the transmitted energy, one should clearly recognize that physically this current produces only a loss and in no way has a direct part in the phenomenon of power transmission.”