[Phys-L] Re: Why 60 hertz?

[Herbert H Gottlieb <herbgottlieb@JUNO.COM>]

According to the Absolute Astronomy Reference
http://www.absoluteasztronomy.com/encyclopedia/a/al/alternating_current

"It is generally accepted that Nicola Tesla chose 60 Hz as the lowest
frequency that
would not cause street lighting to flicker visibly. The origin of the 50
hertz frequency
used in other parts of the world is open to debate but seems to be a
rounding off
of 60 Hz to the 1 2 4 5 10 structure popular with metric standards."

Herb Gottlieb


On Fri, 25 Mar 2005 09:48:53 -0700 Larry Smith <larry.smith@SNOW.EDU>
writes:
> A student asked the historical question about why America chose wall
> AC to be 60 hertz and why Europe chose 50 hertz.  I'm interested
myself.
> Thanks in advance,  Larry
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