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Paper Plate Education
"Serving the Universe on a Paper Plate"

Activity: Portable Sundial IV

Sundial IV dual plates conjoined.jpg (352941 bytes)

The excerpts reprinted below are from "A Customized Sundial Onepager" by David Batch, GLPA Proceedings, 1993, pp. 25-27.  Used with permission.

For this paper plate version (shown as a rough draft), the variation comes in the making of the gnomon.  Measure and draw a wedge on each of two plates, with the angle being equal to your latitude.  On the first plate, cut the radius on the left wedge line and fold up the wedge at the right line.  On the second plate, cut the radius on the right wedge line and fold up the wedge at the left line.  Then stack the plates and secure the two wedges with tape to create a single gnomon.

    Sundial IV dual plates upturned.jpg (387165 bytes) Sundial IV dual plates ovhd.jpg (397894 bytes)

From the base of each gnomon mark off the appropriate number of degrees and label the hours according to the instructions below.  

   

For variations on sundial activities, see Eye on the Sky's "Sundials: Observing and Using Shadows."  Within this website, see Portable Sundial, Portable Sundial II, and Portable Sundial III.

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Copyright 2012 Chuck Bueter.  All rights reserved.