Re: sky, polarization, & retinas

[Phil Parker <PPARKER@TWSUVM.UC.TWSU.EDU>]

> Date:    Thu, 17 Jun 1999 19:50:50 -0700
> From:    William Beaty <billb@ESKIMO.COM>
>
> While on a long, boring drive
"drive" -- Are your car windows tinted?  Most newer ones are, and may
provide a (weak) polarized light filter.  Many shades do,  too, and
some prescription glasses whether shades or clear (or variable).

> at the blue sky, and a particular zone in the sky will become dim and
> bright.  This zone forms a huge band which arches across the sky at 90
> degrees from the location of the sun.  E.g. at sundown this band of
> polarization sweeps from the western horizon, up to the zenith, then down
> to the eastern horizon.
I suspect you meant "northern to southern"...

> The sky in this band is fairly dark blue, while
> the sky towards the sun and opposite the sun is much lighter and
> unpolarized.
...especially given this addition.


   Phil Parker

--------------------------------------------
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