Why does water look blue in a lake, but clear in a glass? (Even if it’s still lake water in the glass)

Question

Why does water look blue in a lake, but clear in a glass? (Even if it’s still lake water in the glass)

In: Earth Science

Answer 1

Also the makeup of the material in the lake will effect color, ie is it a sand bottom, or is it granite stone or etc it will effect how the light is reflected and change the way it appears to the eye.