[FRIAM] sum of atomic spectra == 9000K black body?

Russell Standish lists at hpcoders.com.au
Sat May 16 00:25:36 EDT 2020


I suspect the shape of the curve is due to adding up a whole bunch of
unrelated things with some lower wavelength boundary, just like the
"law of large numbers" theorem, that shows adding up random numbers
gives a normal distribution (bell-shaped curve). The same might be
said of the black body curve (although it has been ages since I've
looked at the mathematics of that).

The peak of the curve at 9000K is probably a coinicidence, although
IIUC, the universe was constantly cooling from the first spit second,
so is the point at which it was 9000K significant in any way?

Anyway - meh - someone else can look into this.

On Tue, May 12, 2020 at 05:59:11PM -0400, Roger Critchlow wrote:
> Jon --
> 
> It's a mystery to me.  I believe they are simply counting the number of
> spectral lines at each wave number and plotting the histogram.  And the link is
> between the now and the very long ago.  And I believe there's no reason to
> expect this histogram to have any particular distribution at all?  It's just a
> weird result.
> 
> -- rec --
> 
> On Tue, May 12, 2020 at 1:10 PM Jon Zingale <jonzingale at gmail.com> wrote:
> 
>     Roger,
> 
>     I get the sense that this is a link between the very small
>     and the very large, but I am far from being a physicist.
>     Could you say more about this result?
> 
>     Jon
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