Re: Haidinger's Brush

From: Skywise (into_at_oblivion.nothing.com)
Date: 12/10/04 

Date: Fri, 10 Dec 2004 23:56:51 -0000

"Mark W. Lund, PhD" <mlund@powerstream.com> wrote in
news:41b9c6dc$1@news.mcleodusa.net:

> The scattered light from the blue sky is polarized as you get
> well away from the sun. When I worked at Motorola
> (circa 1985) in Arizona
> there was a large north-facing window with a neutral-density
> film on it. It was quite easy to see the brush while standing
> at the window while looking into the sky at lunchtime.
>
> I don't know if the neutral-density film was helping by reducing
> the brightness, I should have investigated it, but I didn't
> spend much time outside!
>
> Best regards
> mark
<Snipola>

I tried later yesterday around sunset. Didn't see it.

I also tried viewing various white surfaces illuminated by
an LCD computer monitor. Didn't see it.

But now i'll have to try the sky again with my sunglasses on.
They're about the darkest I can find and I have noticed a lot
of other optical phenomena in the sky before with them that I
could not see without. Perhaps they'll work for this too.

Brian 

-- 
http://www.skywise711.com - Lasers, Seismology, Astronomy
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