[PPRAANet] Flashing Light QSO

[Dennis Major]

Bob, Paul, et al,  (does that qualify me as a poet?)

To answer your question, it helps to pick a color (of light). Since blue is 
my favorite color, I went with a wavelength of about 500 nano-meters (nm). 
(It's also easier to divide 300,000 by that!) Since visible light runs from 
about 400 - 700 nm, and a lot of people seem to prefer the color blue, we 
could just call it the "500 nm band".

So, divide 300,000 Km/s (speed of light) by 500 nm (wavelength) and you will 
have the frequency in Hertz.

30 x 10(5)  /  5 x 10(-7)  =  6 x 10(12)   (parens = exponents)

So, that is 6 tera Hertz or 6THz.


73

Dennis
N0ABC

P.S. I keep a little 500nm HT on my keyring!




----- Original Message ----- 
From: "Bob Witte K0NR" <list at k0nr.com>
To: <ppraanet at mailman.qth.net>
Sent: Saturday, August 26, 2006 11:29 AM
Subject: Re: [PPRAANet] Flashing Light QSO


> Paul,
> I subscribe to the K9YA Telegraph and noticed the article. Great story!
>
> Now, how many Hertz is light? You'll need that for the QSL card, I think 
> :-)
>
> Bob K0NR
>