fflo: (dork L)
fflo ([personal profile] fflo) wrote2005-03-01 02:41 pm

Always remember & never forget . . .

... the Fermi Golden Rule:

$$B(\omega,v-v_*)=\frac{1}{8\pi^2}|\omega\cdot(v-v_*)||{\widehat \phi}
((\omega\cdot(v-v_*))\omega)|^2$$

---you know, where the hat $\sphat$ denotes the Fourier transform and $\phi$ is a two-body interaction potential.

[identity profile] peteralway.livejournal.com 2005-03-01 09:22 pm (UTC)(link)
As much as I am rusty, I do recall a certain beauty to Fourier transforms. Both in what they represent in terms of spectrum, and how you could multiply something by a sine wave, and it would come out to zero, on average, if there were no correllation, and come out to something if there were a correllation. A lot of advanced math made me want to crawl into a cave, but Fourier was simple and beautiful. I like the way your ear does it mechanically and instictively to allow you to percieve music.

Of course, all the other stuff in your post was complete gibberish to me.