>
>Hi Gail.
>
>AFAIK the index of refraction is linked to the density of the
>matter. You have to find the density of ethane at the point you
>specified and then compared it to the densities and iors you know.
>It's an approximation but better then nothing.
>
>Check this:
>
>http://webbook.nist.gov/chemistry/fluid/
>


Nice. Is there a formula relating ior and density of liquid or should
I just guess?

Thanks
Gail
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Gail Shaw wrote:

> Nice. Is there a formula relating ior and density of liquid or should
> I just guess?

Comparative analysis in your basement laboratory should suffice :)

-- 
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
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Gail Shaw wrote:
> 
> >
> >Hi Gail.
> >
> >AFAIK the index of refraction is linked to the density of the
> >matter. You have to find the density of ethane at the point you
> >specified and then compared it to the densities and iors you know.
> >It's an approximation but better then nothing.
> >
> >Check this:
> >
> >http://webbook.nist.gov/chemistry/fluid/
> >
> 
> Nice. Is there a formula relating ior and density of liquid or should
> I just guess?
> 
> Thanks
> Gail

Try to find two fluids with similiar densities, then try to inter- or
extrapolate the values. It will be hard for somebody to prove that
you are wrong :)

Marc

-- 
Marc Schimmler

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>Try to find two fluids with similiar densities, then try to inter- or
>extrapolate the values. It will be hard for somebody to prove that
>you are wrong :)
>


Will give that a go. Thanks to all who replied.

Gail
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* http://www.rucus.ru.ac.za/~gail/ * Attempting to reboot universe *
********************************************************************
* The best way to accelerate Windows NT is at 9.8 m/s^2      *
********************************************************************

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In article <3973f2c3@news.povray.org>, "Gail Shaw" 
<gsh### [at] monotixcoza> wrote:

> >Maybe if it is newer than the 46th edition...my CRC Handbook of
> >Chemistry and Physics had a lot of information on ethane and similar
> >compounds, but not the ior.
> Thanks. I'll look out for it. When was the 46th edition published?

1965-1966. My copy is starting to look a bit worn...especially since one 
of the dogs got it.
The newer versions might have the ior...it is apparently available on 
the web, I think there is a free 7 day trial. It might be worth looking 
at. URL: http://www.crcpress.com/
Look under "Web Products" for the Handbook of Chemistry and Physics.

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In article <39741AC8.12BC6979@yahoo.com>, ryan constantine 
<rco### [at] yahoocom> wrote:

> 46th?  funny, i thought it was already past 70th.

It is. My copy is over 30 years old. :-)
Still, it is newer than my (incomplete) set of Encyclopedia Britannica, 
which is from 1959.

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
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"Chris Huff" <chr### [at] maccom> wrote in message
news:chrishuff-730728.11053818072000@news.povray.org...
> In article <39741AC8.12BC6979@yahoo.com>, ryan constantine
> <rco### [at] yahoocom> wrote:
>
> > 46th?  funny, i thought it was already past 70th.
>
> It is. My copy is over 30 years old. :-)
> Still, it is newer than my (incomplete) set of Encyclopedia Britannica,
> which is from 1959.

Same date as our dictionary at home - mostly alright, but oddities abound.
Masturbation, for example, is classified as "bodily self-abuse".

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"Gail Shaw" <gsh### [at] monotixcoza> wrote in message
news:39747932@news.povray.org...
>
> Will give that a go. Thanks to all who replied.
>

... of course it would have been nice if someone had actually known the
bleedin' answer... ;)

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On Tue, 18 Jul 2000 11:05:38 -0500 Chris Huff <chr### [at] maccom> wrote:

>Still, it is newer than my (incomplete) set of Encyclopedia Britannica, 
>which is from 1959.

  Try to hold on to that Britannica set. It will be quite a novelty
someday, when people will marvel at an encyclopedia that isn't on some
sort of magnetic or optical storage medium <s>. It's more interesting to
see what *isn't* contained within the text, as technology has yielded a
heckuva lot of changes since 1959.

-- 
Alan - ako### [at] povrayorg - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer

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> 
> Try to find two fluids with similiar densities, then try to inter- or
> extrapolate the values. It will be hard for somebody to prove that
> you are wrong :)
> 
> Marc
> 
> --
> Marc Schimmler

The dielectric constant also plays a major role in the IOR, since the
IOR is related to the change in the speed of light at the interface
between the two media, and a high dielectric medium slows light more
than a low dielectric medium (I think). So you'd have to take this into
account too ...

Just my ha'penth worth,
	Mike Andrews.

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