Newsgroup sci.physics 204770

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In <327326BB.EFE@mho.net>, jsnodgrass  writes:
>Einstein said GOD exists...
Maybe so, but Pope John Paul II said that GOD doesn't exist.
Debating an issue with "made up quotes" is fun, but it doesn't lead to
any meaningful conclusions.
Wayne Delia, redsox3@ibm.net
"I think a good way to know there's a curse on you is if you open a box
of toothpicks, and they all fly up and stick in your face." - Jack Handey

Klaus Kassner wrote:
> Why do you think it takes more time to write "9" than "1"? Also it does
> not take more time to write "pi", i.e. to indicate a number with infinitely many
> digits than 1. So your idea is not very well-founded.
write 100 1s then write 100 9's... time yourself on each and divide by
100... you will see writing a 1 is much faster than writing a 9...
pi is not a random number.
-- 
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Im Artikel ,
pcp2g@karma.astro.Virginia.EDU (Twisted STISter) schreibt:
>>>So, if someone out there knows the brightness of the the daylit sky
>>>(and the twilight sky as well) PER SQUARE ARCSECOND, we might
>>>be able to (haha) shed some light on this.
>>
>>Finally a logical answer.  
>
>(blush) Gosh, thanks! It happens even on this group eventually.
>
Sure does :-)
>>I agree, one should compare the brightness
>>per resolution element (pixel?) of your eye.
As has been stated earlier this year, any given "pixel" in your eye needs
some 3-7 photons to react too. Is that a helpful information in this case?
I don't think so.
>>I do not know the brightness of the daytime sky either, but I
>>expect that it is comparable to that of the full moon.
Well, as the moon can be seen even during midday, the brightness of the
sky should be much less than that IMHO. As someone like Uncle Al certainly
could produce data of the moons luminance one could calculate a brightness
from it angular size. Taking a star of the sun class both its distance and
size should be known. With these data one should be able to calculate is
angular size and relative brightness compared to the moon. If it's
comparable or better, one should be able to see it, given a black tubus of
some length with two pinholes in it (front and back) to keep any Raleigh
scattered light out apart from the light exactly in line with the star.
But then the question arises: don't the two light sources just add-up?
Thus would we know if we see the star instead of the blue sky if the
starlight is only just above the brightness of perpendicular parallel
daylight of the same pinhole size?
Cheerio
The most dangerous untruths are truths slightly deformed.
Lichtenberg, Sudelbuecher
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