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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