Jim Kelley wrote:

...
http://id.mind.net/~zona/mstm/physic.../StandingWaves


A standing wave, yet presumably not an electromagnetic wave! ;-)

ac6xg

That page is coming up "Not Found." on my browser; Is there an error in
the URL? I am asking because, too often, my browser is giving me this
error on URLs' posted by people ... I can't find any reason for it.

Thanks in advance,
warmest regards,
JS