Photo Gallery

For the Eratosthenes Project.
Created by The HS of Commerce's
AP Calculus Class, 1999

1. To determine the sun's angle of elevation we used a "high tech" chair and yard stick to cast a shadow.

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2. The shadow of our stick near noon.

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3. A student marking the shadow. When the shadow reached its shortest length, we determined the sun was at its highest elevation.

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4. Another photo of the recorded shadow lengths.

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Matthew C. Whitney