You have to look at the experiments conducted by a guy called Trevor Marshall http://www.trevormarshall.com/ http://www.trevormarshall.com/ Note most of his ex

You have to look at the experiments conducted by a guy called Trevor Marshall http://www.trevormarshall.com/ http://www.trevormarshall.com/ Note most of his experiments correspond to radio waves ( WiFi, AM FM etc). But I see no reason to not extend the concept to 50/60Hz and resulting harmonics.