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
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,
