The parallelism of the solar rays
The concept of parallel rays and divergent rays, in relation to the light source, is necessary to validate hypothesis 2 of Eratosthenes.
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,
Hypothesis 1:
Hypothesis 1:
The Earth is flat and the Sun is close
Hypothesis 2:
Hypothesis 2:
The Earth is curved and the Sun is very far away.
Parallelism of the solar rays (for a distant source) 2019 photos
2021 photos
2022 photos