Yes, you did understand the problem correctly. A shadow point is not be that
"interesting" because it would be unique for only one instant of time during the
year. But I think there are unique observations that can be made about any
plane for a sun "setting" beyond the plane. For example, I ca
Well, this is a perfect lead-in to something I've been wondering about.
What, exactly, is the relationship between the ambient temperature and time
of day. I have the subjective impression that the hottest time of day in
the summer is around 3 PM -- 2 hours after the sun crosses the zenith,
leavi
William P Thayer wrote:
> Practically speaking, this is the principle behind the urban layout of many
> old Mediterranean towns: narrow streets make for constant shade in the
> summer; if in addition they are not straight, they also temper winter
> conditions. I noticed this in several towns of c
Ah, but the problem specifies "flat" surface. I took this to rule out
convex-polygonal or elliptical/circular.
I believe that every truly flat surface with no other obstructions in the
way would get some glimmer of sunlight. If the surface is facing north and
is predominantly in the shade, it wi
I'm going to toss my guess into the ring. The lonely man must live at one of
the poles, and since the gnomon on a sundial is equal to the local latitude,
I believe it is 90°. And incidently he isn't lonely, he has all those elves
to keep him company ;)
~psyko~
90 degrees?
On Mon, 19 Jul 1999, Charles Gann wrote:
> Greetings fellow diallers,
>
> This is a bit simple, but I thought it fun anyway.
>
> >From almost every point on earth, a person can leave their home,
> travel north a given distance, then travel east the same distance, and
> finally trav
Greetings fellow diallers,
This is a bit simple, but I thought it fun
anyway.
From almost every point on earth, a person can leave their
home, travel north a given distance, then travel east the same distance, and
finally travel south the same distance to arrive at their home once again.
I'm glad to see someone starting this thread. I also read her column and
wondered about the veracity of her answer.
> -Original Message-
> From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]
> Sent: Sunday, July 18, 1999 9:08 AM
> To: sundial@rrz.uni-koeln.de
> Subject: Question about
Dear all,
LUNOCENTRIC THEORY DISPLACES OLD HELIOCENTRIC THEORY
If you have any connection with the UK you will by now be aware that on the
11 August a tiny portion of this small isle will be 'engulfed' by a total
eclipse of the sun. To celebrate this rare event, almost every kind of
institution
Big enough of course to fit every dialist that deserved it; but what I mean
is this:
>1. Is there any flat surface anywhere that never gets sunshine at some
>moment during the year?
If you mean direct sunlight, yes, lots of them. Trivially, any point
adjacent to, and away from the equator from,
Hi John,
On the flip side of your question, one could ask "Is there any location on
this planet that is not a sundial lovers paradise?" or to go one step
further - "Is there any plane (flat surface) at any location that is not
interesting?" This leads me to a few questions.
1. Is there any f
>On Thu, 15 Jul 1999, John Carmichael wrote:
>
>> Is there anywhere on earth where there is no Daylight Saving Time and is
>> located on the meridian at the center of a timezone?
>>
>> John Carmichael
The 30° East Meridian (GMT +2) runs through the Eastern part of South
Africa, we don't have
In my earlier response to PsykoKidd's question:
>To paraphrase: The question was, "Over the span of a year do all
>places on earth recieve on average exactly 12 hours of daylight
>and 12 hours of night."
I erred in my example. It should have read:
Example: At a point on the equator where
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