Dear List Members (and experts!), I am a new member to this Mailing List - a school-teacher who can see the several curriculum benefits, of using sundials in (mainly Primary) schools.
One of my pupils recently asked me a question, which seemed simple - but after thinking about it, now I am not so sure it has an obvious answer! Basically, is geographic East/West always at exact 'right-angles' to the direction of North/South - or is this affected by Latitude of location? On magnetic compasses, plus most maps (depending on the projection used), East/West is certainly at 90 degrees to North/South - but at (say) the North and South Poles there is no East or West direction at all, or are those locations just 'special cases' (being the exception to the rule)? That is what made me wonder, if East/West might depend on the Latitude. To keep things simple, I am only thinking about horizontal surfaces. I shall look forward to your replies, explaining whether East/West is always at 'right-angles' to North/South (or not, as the case may be). Thanks, Bev Stimpson. -- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
