-------- In message <1057836989.2088307.1472104857885.javamail.ya...@mail.yahoo.com>, Br uce Griffiths writes:
>You'd need a rather thick copper jacket to shield effectively >against the 50Hz magnetic field. As in: A good-sized fraction of the wavelength if I recall :-) Electric fields are so much easier... One interesting thing here is that across distances like this, there would be significant longitudal currents in such a shield. Not as bad as metal spanning the Mississippi, but getting there. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
