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@REPLYADDR Anthony William Sloman
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@REPLYTO 2:5075/128 Anthony William Sloman
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On Saturday, September 30, 2023 at 8:36:53 AM UTC+10, ehsjr wrote:
> On 9/29/2023 10:30 AM, Anthony William Sloman wrote:
>
>
> >
> > The Sun is a black body radiator at about 5800K so it
contains a lot of IR - about half the energy comes out at wavelengths
longer than we can see.
> >
> > https://en.wikipedia.org/wiki/Sunlight
> >
> >> It`s the excitation of atoms by visible sunlight that produces the heat.
> >
> > Actually the excitation of molecular vibrations.
>
> > The only atoms in the earth`s atmosphere are the inert gases,
mostly argon at 0.93% and none of them absorb in the visible.
> >
> What do you actually mean? The statement is wrong.
The only single atoms in the earth`s atmosphere are the inert
gases. The nitrogen and oxygen atoms are present as diatomic molecules.
They don`t get excited by visible sunlight either.
> You have something in mind different that what you said.
You seems to have something different in mind from what I said,
and you need to spell it out.
> Some kind of ellipsis at work here.
ellipsis
/?`l?ps?s/
noun
noun: ellipsis; plural noun: ellipses
the omission from speech or writing of a word or words that are
superfluous or able to be understood from contextual clues.
"it is very rare for an ellipsis to occur without a linguistic antecedent"
a set of dots (...) indicating an ellipsis.
Fred Bloggs didn`t seem to understand the difference between atoms
and molecules which it comes to absorbing solar radiation. Isolated atoms
can`t do it on their own.
Molecules have vibrational and rotational modes that can be excited
by visible light and the longer wavelength near-infra-red that convey
the other half of the sun`s output to us.
Condensed matter is essentially molecular, in that the atoms in it
interact fairly strongly and have vibrational modes that can be excited by
incident radiation.
--
Bill Sloman, Sydney
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