[sdiy] OT: The spin of electrons!

[Magnus Danielson]

karl dalen wrote:
>> String theory is just that, a theory. It combines the fun
>> of abstract math with the fun of abstract physical models.
>> Still they fail to completely model the hyperfine resonance
>> of Hydrogen while the experimentalists have measured it into
>> many more digits than the best theoretical number has been
>> able to reach.
> 
> That sounds contradictoriness?

Not really, just to say that there is more homework to be done, even if 
the biggest lines of corrections have been modeled.

>>> Witch brings up an old DIY question, does current flow
>> at zero volts?
>>
>> On average no, if you measured your volts properly.
>> Eventually they will change the definition of an Ampere from
>> a very constructed theoretical description into being based
>> on the number of element charges passing a cross-section per
>> second.
> 
> It was intended as a ironic joke! **current flows**, see? :)

Ah.

> Anyhow the whole Bohrian model apperas to be false, no lake of balls!

It is a model, but it made more sense than anything else of that time, 
so it gained support. With its help a whole number of things could be 
predicted in a fairly comprehensive mannor. There where deviations 
thought, which led to new refined models. Fine-structure splitting, 
hyperfine structure splitting etc.

The Bohrian planetary model is there because we could not come up with a 
better model, but the math it produced matched what the experimentalists 
was saying.

If you can come up with a complete model of everything, accuratly 
predice all values etc. then basic research would end up in only having 
to produce accurate numbers for the constants rather than measure all 
deviations... and of course attempting to punch hole in the theory. We 
are not there yeat.

We are quite a few years away from that point. We still haven't got 
warp-drive for instance. We don't have a ship lost in the fourth 
quadrant just yeat and we sure does not use worm-holes to travel between 
stars and galaxies.

Cheers,
Magnus