Thanks all! Ruud Hooijenga was right, when I move the light away the times start to converge.
Dan Uza On Wed, Mar 9, 2016 at 5:12 PM, Ruud Hooijenga <[email protected]> wrote: > Perhaps you are too close with the light. Ideally, the rays should be > parallel, as if you were at infinity (or something like 150 million > kilometers). > > I think the rays from the phone flashlight diverge too much, so that the > shadows will, too. > > Op 9 maart 2016 om 15:00 schreef Dan-George Uza <[email protected]>: > > > Hello! > > I've made my first paper template for a cubical sundial, checked the hour > lines on all faces with Orologi Solari, even built a model in Sketchup. All > appears to be perfect until I test it out with my phone's flashlight. The > horizontal and vertical south dial both show the same time, however on the > northern dial and on the eastern and western one time differs by half an > hour or more. I got inspired by this model > http://www.stegers.ch/sundial/wuerfel.pdf which apparently has the same > issue. I wonder why. Am I doing something wrong? Any help will be much > appreciated. > > Dan Uza > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > >
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