Eratosthenes did the trigonometry before any concept of light refraction was known, and the numbers he found are still treated as correct.
The same effect can be created with a closer light source on a flat surface, if instead of assuming the light is coming like an = it were approaching as >. Just saying.
Eratosthenes did the trigonometry before any concept of light refraction was known, and the numbers he found are still treated as correct.
The same effect can be created with a closer light source on a flat surface, if instead of assuming the light is coming like an = it were approaching as >. Just saying.