Parallelism of solar rays
The concept of parallel rays and divergent rays, in relation to the light source, is necessary to validate hypothesis 2 of Eratosthenes.
La notion de rayons parallèles et de rayons divergents, en relation avec la source lumineuse, est nécessaire pour valider l'hypothèse 2 d'Eratosthène.
| Hypothesis 1: The Earth is flat and the Sun is close | Hypothesis 2: The Earth is curved and the Sun is very far away. | |
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Aim: validate hypothesis 2 of Eratosthenes Observation Observe the parallelism of the shadows of lined up gnomons. Production Draw the sunrays and edit a Gif animated, | Objectif: valider l'hypothèse 2 d'Eratosthène Observation Observer le parallélisme des ombres de gnomons alignés. Production Dessiner les rayons du soleil et éditer un Gif animé, |
 | Take a profile picture rather than a front one, to avoid a perspective effect Prendre une photo de profil plutôt que de face, pour éviter un effet de perspective |
Twinspace tutorial : Make an animated gif
Pogana - Romania
Aigio Greece
Busteni - Romania
Malovat Romania
Athens Greece
Pogana Romania
Bizerte Tunisia
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Experiments from students
Experiment with parallel rays made at home by Kanelli Eleanna, Aigio.
