Compass In A Watch

 

after Martin Gardner

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Do you know that you can use your analog watch as a compass on a sunny day? Look at your watch and point the hour-hand in the direction of the sun, as it is shown in the illustration. Imagine a line which runs from the center of the watch through a point half-way between the hour-hand and number 12. This line will point south.

The method works for the northern hemisphere. Will it work for the southern hemisphere as well?

 
Last Updated: June 11, 2005
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