This blog will contain short video clips or images of different aspects of nature. There is no rhyme or reason why I post what I do...it is something interesting to me and maybe to you. Enjoy!...........................
(All videos and images are copyright by David G. Iadevaia, Ph.D. Tucson, AZ)
Sunday, November 6, 2011
Demonstration of An Equatorial Sundial
Prof. Iadevaia demonstrates the workings of an equatorial sundial. From August to November the shadow can be seen on the top face then the bottom face. On the day of the equinox no shadow is seen.
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