The ray _RO_ (Fig. 65) passes obliquely through the air to the surface of the water, but, on entering the water, it is bent or refracted and takes the new path _OS_. 伯莎M.克拉克.科学通论.
Why, here's three Js, and three Os, and three J-O, Joes in it, Pip! 查尔斯·狄更斯.远大前程.
When the ray _RO_ enters the water, its path changes to _OS_. 伯莎M.克拉克.科学通论.