Читать книгу The Notebooks of Leonardo Da Vinci. Complete - Leonardo da Vinci - Страница 78

If the judgment of the eye is situated within it, the straight lines of the images are refracted on its surface because they pass through the rarer to the denser medium. If, when you are under water, you look at objects in the air you will see them out of their true place; and the same with objects under water seen from the air.

The intersection of the rays (76-82).