Dear All, There is much talk about the recent photograph of the Princess of Wales and her children.
In one newspaper I read that "a former digital forensics officer for Dorset Police said... 'In a true image, the shadows will all be in the same direction as the light'" Huh! He has clearly never looked at a sundial! He may mean 'in the opposite direction' but that isn't true either. Moreover, shadows do not necessarily align. A Double Horizontal sundial works precisely because its two shaodws are (generally)in different directions. Of course, a shadow CAN be in the same direcion as the light. I'll leave that as an exercise for the reader :-) Frank King Cambridge, UK --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
