Assignment Part 2 ( SUN and SHADOW)
This is similar to setting the correct time on analog clock or wristwatch (by moving the hand of the timepiece into proper position), when the project is done properly every move of the sun move the gnomon (straw) shadow into position so that the dial faces display the correct time. During winter the shadow will be under the straw and on top during summer. I used Toronto latitude 43 degree
How it works
o The gnomon should be parallel to the Earth’s axis, inclined at an angel equal to the latitude of the observer.
o Place it on a horizontal surface; the top of the straw point toward the north, or align the upper dial face so that 12 noon points toward north (as shown in the image).
This is done to tell the time in Toronto, and it can also be use to tell time any other locations.
➢ This is easy to carry around and use any where.
posted by Ephraim A @ 12:04 PM
2 comments
2 Comments:
I would find a portable object like this very useful when surfacing from underground, from the subway -- it is at these times that I often find myself the most disoriented, and would like to know where north is. Our grid system city plan lends itself to directional navigation. I also like Joseph's idea that you could use it to tell time if you know where North is!
The more people I discuss this idea with, the more I like the compass as a practical device. I really like the idea of using time as a way to find direction (beginning with the watch, moving to the compass). I also like the shadow storytelling that your first outline included. Let's see if these can merge in your device somehow.
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