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Eratosthenes 2024

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Curve of the Earth

Created by Eric VAYSSIE
Last updated by Eric VAYSSIE 5 months 1 week ago

 

Aim: Show the curve of the Earth 

Observation   With a flat Earth, same shadow in Alexandria and Aswan  With a curved Earth: a shadow in Alexandria and no shadow in Aswan 

Production  Photographies of both observations

Productions from previous years

 

Objectif: Montrer la courbe de la Terre 

Observation  Avec une Terre plate, même ombre à Alexandrie et à Assouan  Avec une Terre courbe : une ombre à Alexandrie et pas d'ombre à Assouan 

Production  Photographies des deux observations

Productions des années précédentes

Carl Sagan "Cosmos" Episode 1 (1980)

Description

Print or draw a kind of egypt map (included in page, follow the link above), stick 2 small vertical things on the map (Alexandria, Syene), and under sun light guide students to curve the paper so that there is shadow in Alexandria and no shadow in Syene. Also notice that if the paper (earth) is flat this cannot be done.

 

 

 

Curve of the Earth Twinboard
Egypt map
Egypt map